Hi! This has just arrived today. Seamaster 600 is a is an ordinary watch, but this is little unusual. First it has the combination of Seamaster and Genéve on the dial, and then the combination of numbers and index on the dial, i have only seen one more with a dial like this. Original strapp and buckle, very good condition and runs fine. Dont think it has been used very much. Ref. 135.011 Cal. 601 1968 Best Thomas
That's a very nice 600. A dial with seamaster and geneve is not as rare as you think. Google will show you some and a few other members of the forum have one.
Not rare but less common than usual. I've seen a few over the years. The grey gilloche dial 600 is my absolute favorite
Simon: It is correct that the combination of Seamaster and Genéve is not rare, i agree in that. It's the combination of Seamaster/Genéve 600 and numbers at 3-6-9-12 and non date dial, i cant find googling
Sorry - have to intrude with some watchmaker geek stuff... If you note the lift angle on the timing machine is set to 52 degrees - this is the default for most machines since Rolex uses 52 for all their current and even most non-current movements. The angle should be set to 49 degrees, so the lift angle set at 52 makes the amplitude look higher than it really is. Rule of thumb is that for every 1 degree off the lift angle is, it equates to about 6 degrees of amplitude error, in this case higher. So subtract 18 degrees from that 296 and it will be closer to what the amplitude really is. Okay, back to your regularly scheduled programming... And yes, it's a very nice example, so congrats to the owner. Cheers, Al
Archer Thanks, new info for me. Is 49 degrees for all Omega's cal. 2XX, 3XX, 4XX, 5XX, 6XX, 7XX and 10XX ? Best Thomas
I don't know of anywhere that you can see this. I know there are some spreadsheets out there made by various people, so if you Google "movement lift angles" or something like that, you might find those. GIYF after all! Here is one link I found doing that: http://www.bhi.co.uk/sites/default/files/LiftAnglesandBeats.pdf And another: http://pczw.uhren-mikl.com/downloads/gamma.pdf
That's the one that I use. ..... but, of course, I have now saved a copy of the BHI one - thanks Al.,
This was quite a timely thread because I saw a Bullhead on eBay, earlier and one of the photos showed a timing machine. What made me think something was amiss was that the machine was showing a really healthy amplitude, but a lift angle of 59.5 degrees. I thought the 930 movement was 860 based - which I know to be 50 degrees - but I was going to search for Al's post where he cited a rule of thumb for correction. I'm not suggesting that the seller is mis-representing the watch - after all, 220 would still put it in spec. after 24 hours, but he is overstating the amplitude by about 57 degrees and let's not mention the asking price. http://www.ebay.co.uk/itm/OMEGA-Sea...91059?pt=Orologi_da_Polso&hash=item35dc0b3e53Purchases made through these links may earn this site a commission from the eBay Partner Network
One thing I learned recently is that there was a special tool for removing the Bullhead's case back. Even stefan had to send his one away to have the back removed - after hearing that, I would want to see a picture of the case back of any Bullhead, that showed a movement shot, on today's newspaper.
Keep in mind the tolerance for the low amplitude would always be measured in a vertical position, not horizontal. The amplitude is always going to be less in a vertical position. Also, the low end tolerance for an 861 is 180 degrees after 24 hours from full wind...which is quite low.... Cheers, Al
