Jaeger-LeCoultre Reverso advice, please!

 By: kjkt3 : August 13th, 2019-11:13
I've been offered a gold Reverso Duoface. It's had a hard life, but is keeping good time. On the case there are two numbers. One , I assume, is the model number and the other for the case or the watch itself;


Would you please advise me where to find the information, if any, that these numbers provide?

Yes the 1st number is reference number, the second is the case number. [nt]

 By: amanico : August 13th, 2019-11:14
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Thank you, Nico. Does the case number indicate the age of the watch? [nt]

 By: kjkt3 : August 13th, 2019-11:43
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Sadly, I don't have a data base to answer with precision. [nt]

 By: amanico : August 13th, 2019-11:47
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From the dates on the papers of Duofacses for sale online, it seems to be at least 14 to 22 years old. [nt]

 By: kjkt3 : August 13th, 2019-13:21
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Is the pusher discrete? In this case, this must be a first generation one. [nt]

 By: amanico : August 13th, 2019-13:25
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I’m confused!

 By: Tiggermelad : August 13th, 2019-20:31
I referred to this in another thread recently.
I thought the second number on the case (seven digits, no stops) was the serial number of the individual watch. Is that what you mean by “case number”?
But what is the other number?
It is clearly not the reference number of the model.
For example, the Geophysic 1958 is reference number 8008520, but the number on the case is 500.8.37.
The Reverso TT 1931 (ref: Q2788570), the Reverso Rouge (Q278856) and the standard Reverso Ultra thin (Q2788520) all share the same number on the case (277.8.62).
Since those three watches have a similar case, that seems to suggest that perhaps the number refers to the style of the case and not the model reference number of the watch, which does not appear on the watch at all.
A couple of days ago I was talking to a JLC dealer: we were trying to match watches in the shop with the details in the catalogue and he was just as confused as I am!

I will submit that to the JLC Team when they come back from holidays. But in the meantime, here is a document I don't remember who to credit for...

 By: amanico : August 13th, 2019-22:45

Th first number: The model, then the case material ( 8=Steel ) then the bracelet or strap material ( 4 ), then the dial color or a random number. 

Hope this helps a bit... 

Most intriguing!

 By: Tiggermelad : August 14th, 2019-01:54
If the final two digits are meant to indicate the colour of the dial, it’s odd that the TT1931 (black) the Rouge (red) and the London edition (green) all use the same number.
The annoying thing is that it doesn’t seem possible to positively relate a particular watch (without its papers) to a model in the catalogue because the catalogue reference number is not on the watch.

That document was " made " some 5 or 6 years ago. I will contact the manufacture in September. But truly a bit confusing. [nt]

 By: amanico : August 14th, 2019-01:56
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This is confirmed by this website:

 By: eklektik : August 15th, 2019-15:16

Reads like..

 By: al.slater : August 13th, 2019-13:51
a standard gt reverso duo in gold (hence 1.54.. mine in steel is 8.54, rose gold seems to be 2.54). 25x case prefix is traditional classique.

Later ones should have the 1000hrs and fish logo to rear of cradle, and pusher that isn’t recessed, along with round sub seconds (think I’m recalling that right)
Earlier ones have recessed pusher (not that awkward), square sub seconds. May find with either single bifold or duofold buckle if not braceleted.. later ones
tend to have the duofold.

.. as you’ve already figured - about 15-20 years ..

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