I just picked up this rare Ulysse Nardin Deck Watch Cir. 1930 with a cabler M 70 m/m ,Three quarter plate gilt movement with Earnshaw's spring detent escarpment, compensated cut bi-metallic balance with blue steel spring regulator, fully jeweled to the center arbor. They later made pocket watch deck watch with out the detent that the Russians after WW2 copied and you see a lot on eBay. Only saw 2 others on the net not many. This came out of Commander William R. Bricker collection who passed away in 2001 would of loved to meet him and talk military watches. About his collection a good read. https://nawcc.org/images/stories/publications/military_timepieces1.pdf https://nawcc.org/images/stories/publications/military_timepieces2.pdf The chronometer I got in this booklet. Auction of his collection https://www.willishenryauctions.com...-timepieces-collection-auction-march-18-2017/ Here is a mint one for sale I got mine a lot cheaper but like the History of it better since it was once owned by a well known collector. https://www.sellingantiques.co.uk/5...ck-watch-chronometer-by-ulysse-nardin-c1937/# Bricker Dad and him collected military watches that I could only dream of glad to own just one. This has a Kriegsmarine mark that was put on way before they were done as fake to make more money so it's sort of a mystery if real thread from the MWR forum. https://www.mwrforum.net/forums/sho...deck-watch&s=6c4f5c45272eec0a507f7b7d76abe82d Still a valuable watch even if the mark not right but I had a RAF dated 1940 Waltham wristwatch in a Denison case with Waltham 870 movement MWR called fake and a member came up with the RAF specs for my watch legit after all. A few told me never say never. A watchmaker I was thinking of servicing this since he did my Hamilton model 21 chronometer went crazy over said I did well and I would get my money back he said sell it at a auction house he named a few he said skip eBay were I got it. It's in running condition will run for 56 hours on one wind. The key to open the lower part to were you wind it and the other key to change the time you put that in the center of the hands. The movement. I think this has been sold a few times since Bricker passed away he was a WW2 Navy Pilot and probably were in some of the battles in the pacific my Dad was. The watch maker said this was as rare as the first chronometer pocket watch he got excited over it I must of done good on this purchase. The funny thing this was running when I open it after getting it in the mail it came from New York City. I love these old navigation watches when it took some brain power instead of cheating with GPS.
Canuck that one you posted I read Hamilton when they made the Model 21 designed there's after this making some changes for faster production.
Contacted Ulysse Nadin all they could tell me was the production date and caliber of the movement. But they been sold a few times so a lot of lost watch history.
In his book on the marine chronometer, Marvin Whitney indicates that the Hamilton model 21 design was “based on the Nardin” chronometer. Initially, the engineers and designers had considered a “blank sheet” approach to producing a superior chronometer. But time was not in their favour. The Navy needed chronometers NOW! So the sensible way to do it was to choose an existing chronometer design which had a proven record, and design into it features such as the Elinvar Extra hairspring and balance. There was a lot of “borrowing” of design features between chronometer makers. Some bought ebauches from other makers, finishing the chronometers themselves. In some cases, finished chronometers were produced on a sort of private label basis, marked with another firm’s name. So the Hamilton does resemble the Nardin just as it resembles chronometers by numerous other makers and marketers. My Hamilton model 21, made in October of 1944.
A few photo's Before I received this after buying it. I found another on the net that had a detent so thought mine was the same the movement look identical well mine has the lever type I found out. I guess Ulysse Nadin made one with detent one with lever. Kind of a bummer but in some ways better I can have the local guy service it instead of shipping it of in the mail to a specialist. Detents movements are tricky to work on. Still mite have to send it in the mail if the local guy thinks the parts are to big for his ultrasonic cleaning machine this is a little larger than a pocket watch. Do got it regulated to 1 second fast a day it is clean the watchmaker mite say it does not need service at this time I hope.