Two Examples Longines Caliber 21.29 – 1919 and 1943

Leigh Callaway

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Sep 5, 2011
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Please add any information and photos you have about the caliber 21.29. Please compare/contrast these two (e.g., are those balances different?) More information in an earlier post Chronometry: - Longines Deck Watch | NAWCC Forums

Here is my earlier watch (1919). Whitney called it a “Torpedo Boat Watch.”
Longines 1919 Box.jpg Longines 1919 Dial.jpg Longines 1919 Case Back.jpg Longines 1919 Case.jpg
Longines 1919 Movement.jpg Longines Extract 2975729.jpg

And here is the later (1943) as a lever escapement marine chronometer. See Figure 61 on page 299 of Whitney’s “Military Timepieces.” This is in a two tiered box which is so shallow that the clock cannot be inverted without removing it from the gimbal.
Longines 1943 in Gimbal.jpg Longines 1943 Dial.jpg Longines 1943 Movement.jpg Longines 1943 Inverted.jpg

Extract Longines 6433862.jpg Longines Email Answer Jul 5 2021.jpg

I hope to find another navigational watch fitted with the 21.29 – the Longines A-13. In another post Master Navigation Watches: A-9; A-13; 5740; and 5740-1 | NAWCC Forums, (post number 4), onsite shows photos of an example (serial number 5734438) and says “Longines-Wittnauer manufactured a Type A-13 GCT navigation watch in accordance with military specification 27968.”
 

Leigh Callaway

NAWCC Member
Sep 5, 2011
212
471
63
Upper Valley, New Hampshire
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Two more examples with the 21.29 movement.
Does anyone have more 21.29 examples?
Good info here: Master Navigation Watches: A-9; A-13; 5740; and 5740-1 | NAWCC Forums

A-13 SN 6061607. Per Longines "It was invoiced on 25 April 1941 to the company Longines-Wittnauer Company, INC, which was at that time our agent for the USA." The Longines A-13 was manufactured to a different spec than the Elgin.
A13 SN 6061607r Dial.jpg A13 SN 6061607 Mvmt.JPG A13 SN 6061607 back.jpg



A-9 SN 2961512. Per Longines "It was invoiced on 4 February 1939 to the company Longines–Wittnauer Company, INC., which was at that time our agent for the USA." Hacks with a slide switch on the side.
Longines A9 01.jpg Longines A9 04.jpg Longines A9 03.jpg
A-9 photos courtesy Jones & Horan
Worn case back reads:
U.S. ARMY A.C.
NAVIGATION MASTER WATCH
TYPE A-9
MFR'S ASSY. DWC NO. 21/29
SERIAL NO. A.C. 38-65
ORDER NO. A.C. 38-65
SPECIFICATION NO. 27783
LONGINES


 
Last edited:

Warwian

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Nov 2, 2015
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I own a Longines deck watch and observatory chronometer using the 21.29. SN 2961090 was adjusted by David Perret for the 1928 Geneva observatory competition where it received 659 points and an honorable mention. It has a Guillaume balance and I believe this was the highest grade offered. In 1937, the movement, in its brass observatory testing case, was invoiced to Longines Wittnauer in the US, where it was cased.
To take part in the Geneva observatory competitions, Longines opened an adjustment workshop in Geneva in 1922. It was managed by David Perret and located at Wirth & Co, the agent for Longines in Switzerland at that time.
5tPdSb8.jpg uqQBCa6.jpg
 

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