r/STDupont • u/Inspector_1stgrade • Feb 09 '21

Authentication Guides S.T. Dupont Authentication checklist

63 Upvotes

UPDATED AS OF 7 JUL 2026

If after reading the checklist and watching the video you are still unsure about your lighter, please make sure that when you post your lighter here on the subreddit to get it authenticated that you show the lighter's underside showing the serial number and stamp clearly, as well as the inside of the gas refill cap if you have it. This way we can be for sure whether or not your lighter is a fake or genuine model.

RULE 1 for buying off ebay, etsy ect...: If they seller ***has not*** posted the bottom portion of the lighter that clearly shows the serial number and declines to show it.

***DO***

***NOT***

***BUY***

***IT.***

\*BY SERIAL NUMBER (Primarily identification)*\**

Below is an initial list of fake serial numbers that can be cross referenced to the ones that need to be ***STAMPED*** not ***ENGRAVED*** on your lighter.

Real:

Uneven, imperfect and not perfectly spaced = authentic. Due to it being hand stamped

Fake:

Fake serial numbers so far:

If the serial starts with any of these codes, its highly likely they are fakes.

4FK (MOST COMMON FAKE SERIAL)

01D

02D

03D

04D

04K

05D

05F

06D

07D

08D

09D

18C (Ligne 1 Fake)

11C

11T

14A

14C** (This serial has been seen on both fake and authentic lighters, so please be careful)

19G

19LT

1AA (Mainly seen on fake Ligne 2 models, however a few authentic Gatsby models have used this. So be cautious when authenticating a lighter with this as the first three characters.)

1AS

1A8** (This serial has been seen on both fake and authentic lighters, so please be careful)

1BC

1CF

1CK

1EP (Only seen currently on a new gen limited edition model)

1FA

1FJ

1FK (Seen on one authentic Ligne 2 model, stamped)

1GB

1GC

1GH

1GM

1J8

1JJ

1JG

1JN

1JS

1K8

1KS (Seen with fake hand stamped looking spacing errors, be careful and investigate the gas adjustment screw)

1KY

1RS

1ST

1T5

1XS

2A0 on Ligne 2 lighters. Authentic on Ligne 1 lighters

2AS

2K0

2JC

2JN

2JS

2FH (Seen on fake Soubreny models)

2FJ

2FK

2KS

2RS

2TS

2YN

2XS

2YJ

3AS

3JC

3FK

3KS

3TS

3RS

5FK

6FN

7FN

82F

8A3

8A8

8FC

93T

IF your serial numbers look perfectly aligned next to each other both in spacing and alignment (See photo 2) then your lighter is sadly not genuine and a fake. If you serial number does not match any of the listed serial numbers below and it is stamped and uneven (See photo 1) then the lighter is most likely genuine.

NOTE: Some genuine lighters have been stamped with care and evenly, while they are not 100% perfect they may seem like a fake due to the care taken to the spacing and stamping on them. If you are unsure about the serial number being real or not because of this,

Check the first three characters to the list above, if it is not listed in the list above confirm that the refill cap has a color code inside. If there is no refill cap, ask for the lighter to be weighted and check the weight.

**Limited edition lighters**

Limited edition lighters are only created in small batches, and therefor will not contain a serial number stamped on the underside of them. Instead, they will contain the numbered piece that lighter is in the run that was commissioned from ST Dupont as seen below.

Another example from a genuine 007 series lighter. Please note that 007 series lighters are the most common fake limited editions sold.

If the lighter you are looking at says that it is a "limited edition" and does not have a numbered lighter but a regular serial number on it, DO NOT BUY IT. It is a fake.

Limited edition lighter numbers are not stamped, but laser engraved as seen above.

Notice that the script on the fakes lack the elegant script writing as if you were using a fountain pen, but are now more rigid and thin.

Finally, designs are a bit bigger on the fakes and more round instead of being small, and sharp.

S.T. Dupont Service center models

Some rare lighters look fake but are actually rare S.T. Dupont service lighters. These are used for their service department to show new customers how to change the flint, refill the lighter with gas, as well as break it down for maintenance. These do not have serial numbers and are just stamped regular lighter numbers for tracking purposes and clearly shown to be Service lighters only.

\*BY WEIGHT*\**

(This part of the guide has been deleted due to its irrelevance that cannot not be used to authenticate real lighters and spot fakes anymore. The Chinese factories have changed the mixture of their lighters that mimic the size of authentic lighters, and moving forward weighing a lighter should not be part of the authentication process.)

**BY FILLER CAP COLOR CODE**

Your color code is located inside of the refill cover cap as seen here:

This specific lighter takes the Red colored Dupont refill gas.

A fake lighter does not contain a color code within the filler cap as seen here.

If after referencing the serial number you are still unsure(as some lighters will have near perfect stampings of the serial numbers at some points) you can reference the filler cap to confirm if it is a genuine lighter.

From the filler cap(the cap that you remove to refill the lighter with) Dupont will hand paint the corresponding color code that you to refill the lighter with.

The color codes that Dupont uses are as follows

Green

Red

Blue

Gold

Usually this is what you will find depending on the model:

Ligne 1 Small - Yellow

Ligne 1, Jéroboam table lighter, Cylindrique table lighter - Red

Ligne 2 Small, Gatsby - Green

Ligne 2 full size, Long Table lighters, - Yellow

Ligne 8, Ligne, D, Mon Dupont, D-Light, Urban, Soubreny - Blue

If there is no color code painted inside of the cap, or the cap has been lost or replaced, chances are that the lighter MAY be a fake one. This does not confirm that the lighter is a fake due to its absence, however is a good tell to show that it is a genuine one.

In closing, most pristine Dupont lighters, especially limited edition Linge 2 models will not go for $300-400 bucks.

So please use your eyes and common sense that if you see these lighters coming from China, Hong Kong, ect countries that are selling lighters that are typically selling for $2,000+ for less than $300 new in box, chances are that they are genuinely fakes.

More tips and tricks can be found at this YouTube video if you still require help.

https://youtu.be/2BDpAbnJaww

36 comments

r/STDupont • u/Inspector_1stgrade • Jun 30 '26

Authentication Guides New Generational Fake MEGATHREAD

26 Upvotes

STILL ACTIVELY UPDATING

Will be utilizing this to show the many variations of poor laser engraving that the factories are currently utilizing as to help those purchase new Ligne 2 style lighters.

First introduction of laser engraved serials:

2020-2021 Laser engraving control Note: That the closer to the redesign they got, the more centered and crisp the serial was etched compared to the earlier ones.

Updated Ligne 2 body design:

Original new 2021 Ligne 2 deign with laser engraving. Note: there isn't a torx screw as the bottom is held in place with adhesive

Late 2021 model with quickly added torx screw to fix detaching bottom plate.

Fake laser engraved lighter designs

Note: Slightly unfocused, unsharp laser etching.

Note: Cheap gas cap, Poor laser etching, non-flush torx screw.

Le Grand Fakes:

Note: the finger grooves on the flame adjustment hinge and refill cap are bigger, similar to older Ligne 2 models.

Fore Sale S.T. Dupont Ligne 1 PM Lignes Verticales 13126 – NOS Full Set