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Discussion Starter · #1 ·
I received an open face pocket watch from my father for graduation from engineering school almost a decade ago, which I have only recently begun to use on a daily basis. The watch was originally given to my grandfather as a gift for graduating from engineering school himself on Dec. 25, 1923. I can't seem to find a photo of another watch that looks the same on any site. Can you help me identify it (model)? The serial number next to the mechanism is 3835218. I would also like to know if I can have the discoloring to the face restored.

Any help on this?

-p.

photo(4).JPG
 

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Longines Watch Company Longines Serial Numbers and Dates
This table can be used to establish the approximate age of your Longines watch using the serial number. Longines serial numbers are usually found on the back plate of the movement.
YearS/N
18671
187020,000
1875100,000
1882250,000
1888500,000
1893750,000
18991,000,000
19011,250,000
19041,500,000
19051,750,000
19072,000,000
19092,250,000
19112,500,000
19122,750,000
19133,000,000
19153,250,000
19173,500,000
19193,750,000
YearS/N
19224,000,000
19254,250,000
19264,500,000
19284,750,000
19295,000,000
19345,250,000
19375,500,000
19385,750,000
19406,000,000
19457,000,000
19508,000,000
19539,000,000
195610,000,000
195911,000,000
196212,000,000
196613,000,000
196714,000,000
196915,000,000


Date looks right as for the actual model i hope a collector can help you
 

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A 1922 Longines
As Longines have ALL their hand written records, you can write to them with details and they will tell you when and to whom the watch was sold.

Personally I would leave dial as it is

Regards
 
G

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Discussion Starter · #5 · (Edited)
Unfortunately, Longines wasn't able to tell me much, except that it was originally to be a wristwatch sold under Longines Wittnauer. They said the caliber was 18.79ZZ, but what does "caliber" mean? This is obviously a pocket watch, did they use the same insides for wristwatches, just relocating the winding mechanism, or perhaps adjusting the face by 90 degrees? Is there any information out there on this Wittnauer company?

-p.
 

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Unfortunately, Longines wasn't able to tell me much, except that it was originally to be a wristwatch sold under Longines Wittnauer. They said the caliber was 18.79ZZ, but what does "caliber" mean? This is obviously a pocket watch, did they use the same insides for wristwatches, just relocating the winding mechanism, or perhaps adjusting the face by 90 degrees? Is there any information out there on this Wittnauer company?

-p.
Seems they told you a lot
Can you post EXACTLY what Longines said?
Caliber is the movement type.
Regards
 
G

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Discussion Starter · #7 ·
"Following your request, we have the pleasure to give you the information found in our old registers:
at the origin, the serial number 3’835’218 identifies a Longines manually wound mechanical movement, caliber 18.79ZZ.
It has been invoiced to Longines-Wittnauer, Longines’ branch in the U.S.A., on 08.07.1922.
It was aimed to be fitted in a wristwatch, which case and bracelet were produced in the USA under Longines license."

-p.
 

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"Following your request, we have the pleasure to give you the information found in our old registers:
at the origin, the serial number 3’835’218 identifies a Longines manually wound mechanical movement, caliber 18.79ZZ.
It has been invoiced to Longines-Wittnauer, Longines’ branch in the U.S.A., on 08.07.1922.
It was aimed to be fitted in a wristwatch, which case and bracelet were produced in the USA under Longines license."

-p.
Thanks
All makes sense
It was sold ONLY as a movement and by that date expected to be fitted in a wristwatch - that said I doubt Lepine/Open faced movements were going into wristwatches)
so it ended up, as it was originally designed as a pocket watch - Open Face (Lepine)'
and sold by Longines agent Wittnauer

all is good
 
G

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Discussion Starter · #10 · (Edited)
An update from Longines:

"I am sorry to say your movement was aimed to be fitted in a pocket watch, which case was produced in the USA. The caliber number 18.79ZZ is the name gave to the movement. The number 18 indicate a unit of measure still used today to describe the size of a 18.79 lines movement. A line is 2,255 mm."

-p.
 

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Lepine (named after a M. Lepine) indicates a movement with small seconds hand for an open face watch. Normally, you try to place the small seconds hand at 6:00 so in an open face PW, it goes opposite the crown. In a "Hunter" or savonette (lit.: "small soap box") movement, it goes at right angles to the crown. Chronograph movements are traditionally based on lepine movements but there are exceptions (e.g. Frederic Piguet Cal. 1185). The two different movements are achieved by switching the winding system and the mainspring barrel around, compare the Unitas 6497 (lepine):

bidfun-db Archiv: Uhrwerke: Unitas 6497

...and its savonette cousin, the Unitas 6498:

bidfun-db Archiv: Uhrwerke: Unitas 6498

Hartmut Richter
 

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Does Lepine refer to it being a pocket watch, or an open face pocket watch, or the type of movement it has? I can't seem to find a good definition, but people seem to use the term to describe a variety of watches.

-p.
Lepine (named after the inventor Jean Antoine Lepine in 1770) is an open faced watch (pocket) with crown and 12 at '12' o,clock(it also moved the balance wheel from the top plate to inside the plates inline with the gear train)
versus
a 'Hunter' style movement where crown and '3' are at '3' o'clock
 
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