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  1. I'd put the Omega Marine Chronometer in there. It was the most accurate watch of it's day....as worn by another icon, Jacques Cousteau:
  2. I quite like it but I'd expect to disappointed seeing it in the flesh. The dial has a bit of an Aventurine look about it.
  3. Omega all day, particularly because yours looks like a very nice example. The bezel insert on these are often a bit rough. Plus it’s nice to have such amazing technology on the wrist & to listen to the ‘hum’. I’ve just tried to send mine to STS for servicing & refinishing but they advised me that they can’t touch the f300Hz series any longer. They advised me to send it to Omega in Southampton. I gather because Omega won’t supply the parts to anybody else. I won’t be doing that unless I have no other choice. The watch functions extremely well actually & it’s mainly the refinish that I want. However I expect that the parts will be available for some considerable time if you don’t mind sending it to Swatch group. I can still get parts for my Omega Marine Chronometer & that is much older vintage & rarer than the f300Hz.
  4. My 1940 Longines Weems with Cal. 12.8N. Serial number dates movement to 1939. A true WW2 watch. 34mm case & I wouldn’t have wanted to ask a Lancaster bomber navigator why he was wearing a girl’s watch!
  5. Longines 12.68Z from 1945 ….& another 1945 Longines 12.68Z: BEFORE AFTER…….
  6. [img]https://i.imgur.com/qjfmxMVl.jpg[/img] [img]https://i.imgur.com/qjfmxMVl.jpg[/img] Ugh....how do you edit posts chaps? & insert photos?
  7. The Omega Marine Chronometer was introduced in 1974, first with the caliber 1511 & followed by the 1516 in 1976. It was one of the earliest quartz watches. Famously owned by Jacques Cousteau, it was the most accurate watch of it's day, accurate to one second per month. Omega wanted to produce a watch of unparalleled accuracy & the development costs were huge; 30 million Swiss Francs. When the OMC was launched in 1974 it had a list price of £761. By comparison the Omega Speedmaster (Moonwatch) was priced at £124.50. Therefore you could buy 6 Moonwatches for the price of one Marine Chronometer! In total Omega produced a rumoured 10,000 caliber 1500 family watches. Although revolutionary their cost was prohibitive and with the speed of development of quartz during the 1970s Omega wrote off much of the original R&D costs. Anybody else got one? https://i.imgur.com/qjfmxMVl.jpg
  8. All of the WWWs are from 1945. As far as is known all 12 manufacturers simultaneously started to deliver in May or June 1945 (just in time to miss WW2), and after December 1945 there were no more deliveries. The markings mean the following: W.W.W. Means Watch, Wrist (originally Wristlet) & Waterproof in that order. L28181 is the military serial number. The prefix of L denotes that, of the 12 manufacturers, that this is a Record. 546028 is the civilian serial number. The civilian serial number on 10 of the 12 manufacturers is related to the military serial number. In the case of the Record, if you subtract the military serial number from the civilian serial number you get either 517847 or 518047. In your case it is the former. There is also usually a 3 digit number on one of the lugs, being the last 3 digits of the military serial number. In your case 181. It wouldn’t surprise me if the number doesn’t match because case backs often got switched during servicing. Approximately 25,000 Record watches were produced, making it the equal most prevalent along with the Omega.
  9. That’s easy. All of the WWW’s are from a single year…1945. Your IWC has had it’s original Radium dial changed at a later date, to a Tritium-lumed one(hence the circled ‘T’). It has the watch’s NATO stock number on the dial, hence it’s called the ‘NATO dial’
  10. Love Vintage Certina. Under-rated. I've got a couple of their divers:
  11. You're talking IWC mark xi? Mark xi has cal. 89 movement & that looks like one. Can we see the dial?
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