How to date your bottle of cognac

Many people would like to know in what year their cognac bottle was produced. A very legimate question since prices for old cognacs are going trough the roof, but not so easy to answer. There are guidelines to help you, but be careful, it is not an exact science. For instance: from 1935 till 1964 it was mandatory in the US that bottles had the phrase ‘Federal law forbids the reuse of this bottle’, but after 1964 some new bottles were still brought on the market with this sentence on it. Another example: in 1979 the US changed from US customary system (pints, quarts and ounces) to the metric system, but only after 1981 most of the labels complied. So there is a transitional period of two years. In these years they sometimes put both measures, US customary and metric, on the bottles. But even years later you see bottles having both measurements on the bottle.


1. Look at the obvious
2. Try to find when a brand introduced a new feature or a new quality
3. Information on the bottom of the bottle
4. Excise tax information (metal medaillons, paper tax seals)
5. Federal law sentence (US, 1935-1964)
6. Französisches Erzeugnis (Germany, until 1964)
6. Tidyman symbol (1969)
7. Estimated sign or e-mark (1976)
8. Bar-code (1980s)
9. Content in US customary units, UK imperial units or metric measurements (1979-1981)
10. Standard drinks
11. Cotisation symbol (1984-2000)
12. Governmental warning (1989)
13. Green point symbol (1990s)
14. Recycling symbol (1994)
15. Pregnancy icon (2006)

1. The obvious

It does not always have to be difficult. When a bottle is especially made to celebrate an anniversary or commemorate a historic event, the date of that event will be stated on the bottle and that obviously is the year the bottle was produced. There are numerous examples: the silver jubilee of the Queen (Martell bottle 1977), the battle of Freedland (Napoleontic war in 1807, on a ceramic drum of Camus ), the election of president Obama (as the 44th president on a Hennesy bottle in 2009).

But a warning: some bottles had so much success that they have been produced for an extended period of time. Like the Napoléon books of Camus that initially were made in 1969 to remember his birthday in 1769. They are made in huge quantities, in several different colours, portrayed in full or just his bust, and by several different porcelain manufacturers. (I can not believe they would switch between more than two porcelain producers in just one year).

Some bottles have additional information on a card or tag hanging around the neck, like some Martell bottles (Cordon Argent or Extra and others, also some Cordon Bleu bottles).

2. Introduction dates of new bottles or features

When you can find the date of introduction of a bottle, you can certainly narrow down the period. For many old bottles this precise date is not known anymore, not even the brands themselves know, but sometimes you can find uselful information on the internet.
We know for instance that Rémy Martin introduced the Louis XIII in 1874. We also know the first Baccarat bottles of the Louis XII were made around 1900. The bottles with a white top were made until 1981 and the bottles with the golden tops started in 1979.

Four Louis XIII bottles of Rémy Martin: first two are white tops with different labels, last two are gold tops with different necks (see embossed letters on third bottle's neck)

On my bottle catalog pages I have collected as many different botttles as I could find and put them in some sort of logical order. When the date of a bottle was given or if I just knew it, I have put it there. So you could try to find your bottle in these catalogs.

Besides different features of the bottles, other changes occur during the years. Very important indicators of the age of a bottle are the boxes in which they were sold.

Some brands issue limited editions every year. Like Hennessy VS, VSOP and XO limited editions or Rémy Martin Cannes Festival editions. These years are well known to the collectors.

Some of Hennessy's VSOP limited editions: 2011-2012-2013-2014-2015  Rémy Martin, Cannes filmfestival 2014-2015-2016-2017

For one quality several different bottle shapes have possibly been used or different labels. Take a look at these VSOP’s of Bisquit.

Evolution of Bisquit VSOP-bottles through the decennia

To date a Cordon Bleu of Martell the type of cap that was used is important (amongst many other features).

Spring cap, crimped foil cap, corked cap, different corked cap

3. Information on the bottom of a bottle

Useful information is to be found on the bottom of a bottle. You can sometimes find which glass manufacturer made the bottle. If it was for instance Saint Louis Cristalleries on a Louis XIII white top bottle of Rémy Martin, you know it is after 1969.

Louis XIII bottle made by Saint Louis; volume stated too.
Other information can be the content, if this is not stated on the label or the back of the bottle.
Often serial numbers are put on the bottom, that correspond with certain years. This last piece of information is difficult to recover, but can be helpful as a last resort. The assistence of the manufacturer is needed though.
Sometimes you find a date, so that gives clear information. But be warned. A number of two digits not necessarily indicates a date. This is often misinterpreted. A number of four digits starting with 19 or 20 is more promissing to be a date, but not always.

4. Excise tax information

In a number of countries tax seal strips or metal medaillons were used in a specific period.



From 1930 till 1959 little round metal seals were used, hanging around the neck:


Successively they were:

  • Seal of Fascist Italy, used from Novembre 27th, 1933 till May 5th, 1944. It shows the shield of the House of Savoy (Sabaudo) with a crown on top and a fasces on each side.
  • Seal of the Kingdom, used from June 1st, 1944 till Decembre 12th, 1947. Again with the shield of the House of Savoy (Sabaudo) with a crown on top. Both fasces have disappeared and are being replaced by tendons. They are surrounded by a royal cloak.
  • Headseal, used from Decembre 31st, 1947 till April 29th, 1949. With the arrival of the republic a woman’s head was introduced.
  • Seal with star, used from April 4th, 1949 till June sixth, 1959. Five-pointed star.


A small problem for dating a bottle exists because it was allowed to use old stocks of these seal until they were finished. Five-pointed star seal were seen until late in the 1960s.

As of 1959 Italy started using paper seals, but paper seals had also been used long before that date. It proves to be extremely dificult to obtain reliable information about the exact periods these seals were used. On some websites made by whisky-aficionados you can find some information and although these seals were used for grain based spirits one may assume that there have been many similarities. An important difference is of course that the whisky-seal has ‘Aquavite di cereali’ stated as the cognac seal has ‘Aquavite di vino’ or ‘Distillato di vino’. The full text: ‘Imposta fabricazione, distillato di vini, contrassegno di stato’. So on the one end is a star and on the other side of the text is stated, printed obliquely, ‘piu di tre anni’ of ‘distillato di vino invecchiato piu di tre anni’ (wine based distillate, aged over three years).

An old seal with the Savoy shield from the 1940s:

  • From 1952 till 1971 pink paper seals were used with three stars (one in the middle and one on each end). The content was stated as a fraction (for instance: da litri 3/4):

On a Martell bottle from the 1960s  On a courvoisier, 1950s

  • From 1971 till 1976 pink paper seal with two stars were used for whisky’s (one star in the middle and one on one end) and ‘da litri 3/4’ stated (or another fraction of course). I have not seen these on any cognac bottles, so maybe they were not used for cognacs:

  • From 1977 till 1991 pink paper seal with two stars were used (one in the middle and one on one end) and ‘da litri 0,750’ stated (or an other quantity). Again, I have not seen them being used for cognacs, only for whisky bottles:

  • From 1991-2005 half pink and half green seals and ‘Litri 0,700’ stated, and again, I have not seen these on cognac bottles:

  • Interestingly enough, on cognac bottles we mostly see seals in red with only one star. They appear to be from the 1970s and 1980s. No information on such seals on the whisky-sites:

Example on a caraf of Rémy Martin

On a Delamain bottle of the late 1970s

A little warning: in Italy old seals were sometimes used as long as they were available before they started using the new ones. So it happens quite regularly that on the seal it says ‘Litri 0,750’, but on the label of the bottle itself is stated ‘700m’! What can you say…

  • From 2005 green seals and three letters and the content written as 0,70L. The text: ‘accise alcole etilico, bevande alcoliche’.

On a Drouet bottle


After prohibition ended in 1933 they started with red paper seal strips which they have been using until 1985.
From 1934-1944 they had the texts: US Internal Revenu, Tax Paid, Distilled spirits and content information on both ends.
From 1944-1960 they had series 111 printed at the side of the eagles feet.
From 1961-1977 the series changed to 112.

With 1 quart stated on both ends (1934-1944)

with series 112 stated (1961-1977)

From 1977-1982 the text on the upper left changed to Bureau ATF and the content information on both ends of the strip was left off.
From 1982-1985 the text ‘Tax paid’ was replaced by ‘Distilled’ and ‘Distilled Spirits’ replaced by ‘Spirits’. After 1985 they stopped using tax seal strips in the US.

5. The Federal Law sentence

In 1935 the US ordered to have the following phrase stated on each bottle: “Federal law forbids the reuse of this bottle”. Almost always this sentence was embossed on the glass, but is could also be printed on the label.

After 1964 this decree was lifted. So if the bottle does not have this phrase and it is not from before 1935, it is very probably after 1964. But be informed that some people – though very rare – have encountered bottles as late as 1970 with the phrase still on the bottle. It is not exact science.

6. Französisches Erzeugnis

In Germany it was mandatory until 1964 to state the origin of the product. For cognac from France, therefore, ‘Fransösisches Erzeugnis’ was indicated on all bottles. Sometimes on the front and sometimes on the back.

7. The tidyman symbol

The Tidyman symbol was invented in the US in the 1950s. It is introduced in the UK in 1969. It is now used in several countries, but it is voluntarily. Variations on the tidyman symbol exist, like the tidyman glass symbol.

Tidyman symbol    Tidyman glass symbol

8. Estimated sign or e-mark

It was introduced in 1976 by a EU-directive and is still in use in the European Union.



9. Bar-code

The Bar-code was introduced in the US in 1973 and became widely used from the 1980s. It is still in use today.
In the European countries EAN-13 is used, a binary code for thirteen numbers. It was invented in 1974 and is widely used, probably to become the new world-standard.
So if a bar-code is seen on a bottle, it is not older than 1980.


10. Content in US customary, UK imperial or metric measurements (1979-1981)

Both in the US and in the UK different measurement systems were in use, as opposed to the metric system in Europe. At the end of the nineteen-seventies the US and UK started the transition to the metric system.
In the US the change took roughly two years. So after 1981 every bottle has their content in metrics. But not only during the transition period, also for years after, bottles could have both measurements stated next to eachother on the label.

24 fl.oz. and 68.2cl are stated next to eachother in the lower right corner of the label
In the UK the transition period took longer because only after 1995 it was mandatory to have the content in metrics. Though it must be said that most ‘goods’ used prescribed units (i.e. metrics) already in 1980; but not all and I do not know precisely about alcoholic goods.
Other countries, Australia, New Zealand and South Africa, completed the change in 1980.

11. Standard drinks

In the nineteen-eightees the ‘standard drinks’ were invented. So if printed on a bottle it surely is after 1980.

28 UK units alongside some other pictograms

12. Cotisation symbol

The cotisation symbol was used between 1984 and 2000.



13. Governmental warning

From 1989 on it is mandatory in the US to put the governmental warning on bottles containg alcohol.

14. Green point symbol

It was invented in Germany in 1990. A bottle with this symbol therefore is after 1990. It is also known as Green Dot Symbol.
The green point symbol does not necessarily have to be green. The pictogram consists of two intertwined arrows.

15. Recycling symbol

The recycling symbol was invented in 1970 for World Earth Day but is used on liquor bottles since 1994 to indicate that the bottle is capable of being recycled. There are several variations of the symbol.

16. Pregnancy icon

This icon is voluntarily used by producers. In use since 2006.







Dating a bottle — 26 Comments

    • The top one is not a cognac, but a brandy.
      The bottom one is from the 1980s, a low quality cognac (three star or VS.)

  1. Trying to find how old my gold barrel of cognac is..never opened..number on top of bottle is 413605972 djohnson 7291960

    • Hi Deborah,

      That is not much information to go by (no photo). Is it a Hennessy barrel? They were from the end 1960s. The number on top has no sigificance to me. Maybe the Hennessy firm would know.

      Kind regards,

  2. I have a ceramic cognac jar with a picture of napoleon and an eagle each side, on the other side there are two canon with flags. What is the date of manufacture, and is there any value.

    • Hi Les,

      A lot of ash trays have been made in the past, but I am not sure which one you have. Léopold Brugerolle made ash trays with canons, but as far as I know not with a flag on it. Could you send a few pictures maybe?
      I will send an e-mail, that might be handier.


  3. Hi, I have a bottle of old Hennessy Xo unopen. Trying to find it’s date of bottling and current value. No bar code or other labels can be seen on the bottle.

    Hope someone could advise on this. Thanks.

  4. Hello! I wonder if you could help me with dating this bottle and even the value. There is no year and I am not able to find any of the traits that you detailed in the article. I am still new to this!! What you can’t see on the label is on the top right side are five red stars in a circle. I also have not been able to find out the meaning of this. Thank you so much for your help!!!

    • Hello Lisa,
      It is difficult to determine the age of a bottle on a partial photo, but I think this is a five star bottle from the 1960-70s, imported in the US. It seems to be exactly the same bottle as the first one on my bottle catalog page of Hine:
      This is a low quality bottle that is not worth much more than a three star or VS bottle today.
      I do not know what you mean by five stars in a circle on the top right side. I cannot remember having seen that before. If you post a photo of it, may be it will bcome clear to me.

      Kind regards,

      • Hi Ton,

        Thank you very much for your prompt response and sharing your wealth of knowledge! I have attached a pic of the five stars. I have additional photos of the bottle but they are too large to post and I am not very savvy when it comes to adjusting the size. I would be happy to email them over to you if you’d like. Otherwise I can include them in individual comments. I think you are right that it is the first bottle, with the only difference of the stars sticker/Queen Elizabeth II sticker.
        Again, I appreciate your help – and hope you have a lovely weekend!


    • The A.E. Dupuy brand was taken over by Rustad and Bache-Gabrielsen in 1905. They held on to the name A.E. Dupuy. This VSOP is made from grande and petite champagne grapes that they bought from other winegrowers to age in their cellars.
      It also says ‘Napoleon Réserve’ and ‘Très Vieux’, indicating that it has been aged for a very long time, possibly over 20 years, maybe over 30 even. Difficult to say when it was bottled, but looking at the capsule and type of label I estimate this to be bottled in the 1950’s. I do not know of any Dupuy collectors, but I would guess this bottle to be worth around €60 in an auction.

      • Despite the low value, it was nice to read about this cognac. I have another bottle this time, the brand is a bit less known to my person and I’m not even sure if it’s cognac. Please take a look at the picture below.

  5. I have a bottle of henessy fine champagne possibly bought in japan due to the Japanese wordings on the label. The barcode is 3245990001607 and there is another code series L3 336 33 00388. I just want to know how old this bottle of henessy could be.

    • These bottles are from the 1980s (1984-1989), but I don’t know how to narrow it down from reading the barcode.

  6. O have a Louis bottle no marks 10 spurs on each side top of spurs h
    As 8round dots.cork has metal
    Calp with ring running through it with screw and nut

  7. Hi

    I have a “Classique de Martell Baccarat Decanter” that I am trying to find more information about.

    Type, age etc.

    But I have not found any information on the net.

    Can you help me with any information on this, or can you point me in the right direction?

    best regards
    Are Elvestad

    • [Posted 23 of May]


      Have you looked on my Martell bottle catalog page, part 2?

      Martell limited

      Is it maybe the same as the third bottle at nr. 3 Decanters and extravaganza?
      That is a rather expensive bottle, not seen very much. I would say 800-1000 US dollar if the blue box is present. Probably 1990s or late 1980s.

      Let me know if it is this one.

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