How to Read Vintage Clothing Labels for Authenticity (A Complete, Honest Guide From Someone Who Does This Every Day)

I pick up a lot of garments. Every week, sometimes every day. Shirts, jackets, polos, knitwear. And the very first thing I do with every single one is flip it over and find the label. Before I look at the fabric, before I assess the condition, before I even think about price. The label is a document. It is a timestamp. And once you know how to read it properly, it tells you an enormous amount about whether a piece is genuinely vintage, genuinely the brand it claims to be, and genuinely worth your money.

This guide is everything I have learned from doing this every day. It covers the universal clues that work across all vintage clothing, the specific signals for the brands I work with most (Ralph Lauren, Tommy Hilfiger, Lacoste), what to look for when labels have been tampered with, and what to do when there is no label at all. By the end, you will be able to pick up any secondhand garment and run through a proper authenticity check in under two minutes.

Why the label matters more than most people realise

Fake vintage is a real problem. It is not just replicas of luxury goods. It is modern garments being aged artificially, labels being swapped from authentic pieces onto cheaper reproductions, and "vintage-inspired" new stock being sold as the genuine article. The label is almost always where a fake first slips up. The font is slightly wrong. The care symbols are too modern for the supposed era. The country of origin does not match the timeline. Once you know what you are looking at, these mistakes become obvious.

The label also matters for dating. Knowing that a piece is from the early 1980s rather than the mid-1990s is not just trivia. It changes the collectibility, the construction quality, the materials used, and often the resale value by a significant margin. A Ralph Lauren piece with the right label for the right era can be worth €80 to €150. The same style with a later label, or a mismatched label that does not belong, might be worth half that, or nothing.

The anatomy of a vintage clothing label: what you are actually looking at

Most vintage garments have more than one label. Here is what each one tells you.

The brand label

This is the main label, usually sewn at the back neck or, on trousers and skirts, at the waistband. It carries the brand name, sometimes a line name (like "Polo by Ralph Lauren" or "Tommy Hilfiger Athletics"), and often the country of origin. The font, layout, material and stitching of this label all change across decades, and those changes are your first dating clue.

The care label

This is the label carrying washing, drying and ironing instructions. For dating purposes, it is one of the most useful clues you have. In the United States, the Federal Trade Commission's Care Labeling Rule came into effect on 3 July 1972. Any American-made garment without a care label was almost certainly produced before that date. That is a single clue that tells you a piece is over fifty years old. Early care labels from 1972 through to around 1996 use written instructions only ("machine wash warm, tumble dry low"). From 1997 onward, the FTC permitted care symbols (the little icons for washing, ironing and so on) to replace words entirely. So if you see only symbols and no written instructions, you are looking at something made in 1997 or later.

The content label

This lists the fibre composition: 100% cotton, 80% wool 20% nylon, and so on. In the US, the Textile Fiber Products Identification Act of 1960 made fibre disclosure mandatory. So if you have a garment with no fibre content listed at all, it likely predates 1960. The presence of specific fibres also tells you things. Polyester blends only really appear from the late 1960s onward. A label listing 100% Tencel or modal points firmly to the 1990s or later.

The union label

A small additional tag, usually sewn next to or just below the brand label. Found on American-made garments from roughly the 1930s through to the late 1980s. The two most common ones are the ILGWU (International Ladies' Garment Workers' Union) and the ACWA (Amalgamated Clothing Workers of America). The presence of a union label is one of the strongest authenticity signals in vintage. These are hard to fake convincingly, and they tell you immediately that a garment was made in the United States during the union era. The ILGWU label design itself evolved across decades, which gives you additional dating precision.

The country of origin label

Sometimes printed on the brand label, sometimes a separate small tag. This is often the most immediately useful clue for dating a European vintage buyer. "Made in West Germany" tells you the piece predates German reunification in 1990. "Made in Yugoslavia" predates the country's dissolution in the early 1990s. "Made in Czechoslovakia" predates 1993. "Made in Hong Kong" on a garment with no care label suggests the late 1960s or early 1970s. These defunct country clues are almost impossible to fake convincingly because a counterfeiter making a new garment today would have no reason to print a country that no longer exists.

RN numbers: the free, precise dating tool most people ignore

On American garments you will very often see a number preceded by "RN" printed or woven onto the label. RN stands for Registered Number, a code issued by the US Federal Trade Commission to identify clothing manufacturers, importers and distributors. It has been in use since 1952. The key thing to understand is that the number tells you when the company registered, not when the specific garment was made. So it gives you a "not before" date, not an exact year. But that is still enormously useful.

• RN numbers below 13,670: issued between 1952 and 1959.
• Five-digit RN numbers from 13,670 upward: generally indicate a company that registered in the 1960s or 1970s.
• Six-digit RN numbers: point to registration from the 1980s onward.

You can look up any RN number for free at rfrn.ftc.gov. Type in the number and you get the registered company name and filing date. This is one of the most underused tools in vintage authentication, and it takes about thirty seconds. Some garments carry a WPL number instead (Wool Products Label number), which predates the RN system and was used for wool-containing garments. A WPL number with no RN number at all usually indicates something made before the mid-1950s.

One important caution: the RN number tells you the company registered at a particular time. That company may have continued making garments for decades after registration. So a low RN number is strong evidence of an older garment, but a higher number does not rule out an early piece from a company that registered later.

A step-by-step authenticity check you can run in two minutes

Here is the exact process I use when I pick up an unfamiliar vintage piece. Do not skip steps and do not let one positive clue stop you from checking the others.

1. Find all the labels first. Flip the garment. Check the back neck, the side seam, the waistband. Count how many labels there are before you start reading any of them. A genuine vintage piece will usually have two to four labels. A suspicious piece might have only one, or might show signs that labels have been removed.
2. Check for a care label. Present or absent? Written instructions or symbols? This alone tells you a huge amount. No care label on a US garment: almost certainly pre-1972. Written instructions only: 1972 to 1996. Symbols only: 1997 or later.
3. Read the country of origin. Does it match the era you expect? A defunct country name is a strong positive signal. A country that does not match the supposed era is a red flag.
4. Look for an RN or WPL number. Count the digits. Five digits points to the 1960s or 1970s. Six digits suggests the 1980s or later. Look it up if you have a phone handy.
5. Check for a union label. ILGWU or ACWA on a US garment is a very strong vintage signal. Note the label design, as different versions correspond to different decades.
6. Examine the label material and stitching. Genuine older labels are woven, not printed. They have folded or chain-stitched edges, not heat-cut synthetic edges. The thread attaching the label to the garment should be cotton or rayon for pre-1960s pieces, not polyester. Run the label between your fingers. It should feel substantial.
7. Cross-reference at least two or three clues. One signal is interesting. Three signals pointing to the same decade is confidence. If your clues contradict each other, investigate further before committing.

Label material and construction: the details that give fakes away

This is where most guides go thin, and it is where real expertise lives. A good reproduction can print a convincing label design. It is much harder to fake the physical construction of the label itself.

Woven vs printed. Vintage labels from the 1950s through to the early 1990s are almost always woven on a loom, not printed. A woven label has a texture you can feel, with the text formed by threads rather than ink. Under a light source, you can see the weave structure. A printed label is flat and smooth, with ink sitting on the surface. Most labels on genuine vintage pieces from before 1990 will be woven. A "vintage" garment with a flat printed label should prompt a closer look at everything else.

Edge finishing. Authentic older labels have edges that are folded under and chain-stitched, or woven with a self-finished edge. Modern reproduction labels frequently have heat-cut edges, which leave a slightly melted, stiff finish. Run your fingernail along the edge of the label. Clean and slightly soft: older. Stiff and slightly shiny: newer.

Thread and stitching. The thread used to attach the label to the garment is a clue in itself. Pre-1960s American garments used cotton or rayon thread throughout. Polyester thread was not the industry standard until the late 1960s and beyond. If the label is stitched to the collar with obviously synthetic, shiny thread on a piece that is supposed to be from the 1940s or 1950s, that is a genuine red flag.

Embroidery quality. On branded pieces, embroidered logos should be dense, consistent and tight. The reverse of a genuine embroidered label from a quality brand shows a neat, high-thread-count backing. A modern reproduction using digital embroidery often shows a looser, more pixelated pattern on the reverse, with less consistent thread density.

Brand-specific label authentication: Ralph Lauren, Tommy Hilfiger and Lacoste

Generic label knowledge gets you most of the way there. But for the brands I work with most, knowing the specific label evolution across decades is what separates a confident purchase from a guess. Here is what I look at on each.

Ralph Lauren

Ralph Lauren is one of the most faked brands in the vintage market, and the label is always the first place I check. The earliest Polo by Ralph Lauren labels from the late 1960s and 1970s are simple: a navy background, clean white text, and a separate small size tab sewn below. That separate size tab is important. On genuine vintage pieces, it is always a distinct, separately sewn label. On fakes, it is sometimes printed directly onto the main label or is oddly proportioned. If there is no separate size tab at all, that is your first red flag.

The stitching on genuine Ralph Lauren labels is consistent and tight, the navy background is a specific deep shade, and the font proportions are exact. Fakes frequently show uneven embroidery, a slightly wrong shade of navy, or letter spacing that is marginally off. These details are easy to miss if you are looking at a single piece online, which is exactly why I always ask for close-up label photos when buying remotely. You can read more about this in my detailed guide on how to read vintage clothing labels and date them, where I go through the Ralph Lauren label evolution era by era.

Country of origin on Ralph Lauren is worth understanding. Vintage pieces were made in many places: the USA, Hong Kong, Taiwan, India, and later Eastern Europe. None of those automatically signal a fake. What raises a flag is a label claiming early 1980s production but saying "Made in China," which is not consistent with where the brand was sourcing at that time. From the late 1990s onward, Chinese manufacture on genuine pieces is entirely plausible.

Tommy Hilfiger

Tommy Hilfiger launched in 1985, so any piece claiming to be earlier than that is automatically suspect. The brand's label went through clear changes across its early decades. The earliest labels from the mid-1980s tend to be simpler, with the full name in a clean horizontal format. From the early 1990s, the iconic flag logo became central to the label design, and the neck label format shifted: earlier versions are short rectangles, later versions become longer strips with the flag used as a visual break between "Tommy" and "Hilfiger."

Genuine early Tommy Hilfiger pieces are increasingly collectible. A well-preserved 1990s piece in a bold colourway can realistically sell for €60 to €130 depending on the style. The label should be substantial and woven, the stitching should be clean and even, and the colours on the flag logo should be crisp and correctly proportioned. If you want to go deeper on Tommy Hilfiger quality across eras, I have written a full guide on whether Tommy Hilfiger is worth buying secondhand which covers construction quality in detail.

Lacoste

Lacoste has a complication that most buyers do not know about: for most of the 1970s and 1980s, Lacoste licensed its brand to Izod in the United States. Garments from this period carry a combined "Izod Lacoste" label, not a Lacoste-only label. These are genuine licensed products, not fakes, but they are not made directly by Lacoste and should not be described as if they were. A proper "Lacoste" only label on a piece claiming to be from the mid-1980s US market should prompt a closer look.

On all Lacoste, the crocodile embroidery is the key detail. The original has clean, dense embroidery with defined lines: the teeth, eye and tongue are all clearly formed. The green is a specific shade. On fakes, the crocodile tends to look cartoonish, with poor proportions and loose threads. The label itself should be woven with clean edges and a clear, correctly spaced "LACOSTE" in capitals. Counterfeits frequently show misaligned letters or a slightly different font, and the label material is often thinner and less substantial than the genuine article.

Red flags: when labels have been manipulated or replaced

Label swapping is real. An unscrupulous seller removes the label from a genuine vintage piece and sews it into a cheaper or more damaged garment. Or they remove a care label that reveals an inconveniently recent manufacture date. Here is how to spot it.

• Mismatched stitch lines. If the label is sewn with thread that is visibly different in colour or weight from the original stitching on the rest of the garment, something has been reattached.
• Ghost marks. If a care label or country of origin tag has been removed, you will often see a rectangular shadow or slight discolouration where it sat, especially on lighter fabrics. That shadow is your signal to ask questions.
• Labels that feel loose or re-sewn. Gently pull the edges of the label. A genuinely original label has been attached for decades and sits firmly. A recently re-sewn label often has slight puckering, uneven tension, or thread ends that have not been properly finished.
• Internal clues that contradict the label. If the label says 1975 but the care instructions use modern ASTM symbols, something is wrong. If the label says "Made in USA" but the zipper is a modern YKK plastic type not used until the 1980s, check everything again.
• A modern-looking care label paired with a supposedly old brand label. This is one of the most common giveaways. Someone has kept the old neck label and removed or replaced a more revealing care label.

Decade-by-decade quick reference

Here is a fast reference for the most common label signals by era. Think of it as a shortcut, not a substitute for the full check above.

• Pre-1960: No care label, no fibre content label, woven rayon or cotton label, WPL number, elaborate serif fonts, paper or embossed labels.
• 1960s: Still no care label (US), fibre content starts appearing, RN numbers in the five-digit range (lower end), union labels still common, "Made in Hong Kong" or "Made in Japan" appearing alongside US-made.
• 1970s: Care label with written text appears after mid-1972, polyester blends widespread, "Made in Taiwan" and "Made in Korea" labels common, ILGWU labels with red, white and blue colour scheme from 1974 onward.
• 1980s: Larger, more brand-assertive labels, multiple interior labels, six-digit RN numbers, union labels beginning to disappear, bolder typography, "Made in China" starting to appear.
• 1990s: Care symbols starting to appear alongside or replacing text (from 1997 onward in the US), shift toward predominantly Asian manufacture, labels becoming larger and more marketing-focused, some brands introducing country of manufacture alongside country of design.

What to do when there is no label at all

It happens. Labels wear out, get itchy and get cut out, or disintegrate on very old pieces. A missing label is not automatically a red flag. But it means you need to rely on other clues entirely.

Construction details become your primary evidence. The zipper type and brand matter: American Talon and Lightning zippers predate the dominance of YKK, which became the standard from the 1960s onward. Button material tells a story too: natural materials like horn, shell or metal predate widespread plastic use. The stitching quality and seam finishing, the lining material if present, and the overall cut and silhouette of the garment all carry era information. The Woolmark logo, if present anywhere on the garment, tells you the piece cannot predate 1964 when that certification was first introduced.

For more detail on reading construction quality as an authentication tool, my guide on how to spot quality in a secondhand dress shirt goes into the construction signals in real depth.

Practical notes on buying vintage online

Reading labels in person is straightforward once you know what to look for. Online is harder, but the same principles apply. You just need the right photos.

Always ask for: a clear photo of the full brand label, a separate photo of the care and content label, a photo of the country of origin label if it is on a separate tag, and a close-up of any logo or embroidery. A legitimate seller will send these without hesitation. If someone gets defensive, says the photos are "good enough," or cannot photograph the inside of the garment, that tells you something. It is not necessarily a sign of dishonesty, but it is a reason to be more cautious.

Check whether the labels shown in the photos are internally consistent. Do the care symbols match the supposed era? Does the country of origin make sense for the brand's sourcing history at that time? Does the font on the brand label match what you would expect? These questions take thirty seconds to run through once you have done it a few times, and they save you from expensive mistakes.

Reading vintage labels well is a skill that compounds quickly. The first few times, you are looking everything up. After a few dozen garments, the key signals become instinctive. You will find yourself glancing at a label in a thrift shop and knowing within ten seconds whether something is worth picking up for a closer look. That is a genuinely useful skill, and it makes the whole process of buying vintage more rewarding and much less risky.

If you want to keep building that knowledge, my deeper guide on how to read vintage clothing labels and date them goes further into the decade-by-decade brand evolution for Ralph Lauren, Tommy Hilfiger and Lacoste specifically.

And if you would like to browse a carefully authenticated selection of vintage and secondhand designer pieces where all of this work has already been done for you, take a look at what is in the shop at Revaleur. Every piece has been checked, labelled honestly and described accurately. That is the whole point.