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Hamilton Jazzmaster GMT Repair Video

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Mark Distinguished Member

Mark

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Thank you, I will...
Indeed the base movement is a 2892-a2 so there's just the added GMT complication under the dial. I haven't done a video bit I have worked on them and they are not too complicated. It's a 2893-2 movement - perhaps cousins has a data sheet detailing the differences and lubrication points.

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Folkvisor Super WRT Addict

Folkvisor

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However, the first one I bought quit working about an hour after I started wearing it. So, I took it back and they replaced it with a new one but it had an issue with the GMT hand; it moved 4 hours instead of one on the 24 hour dial. So it was sent back and they replaced the movement. Now it works perfectly and they were embarrassed to the point that they threw in a travel case and a winder to boot. 

I'm wearing it now...

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      By GuyMontag · Posted

      I have that French tech sheet too, it is a little different than the English one (eg, it doesn't have the auto works diagram). BTW, it looks like you are looking up the case number in the 1979 ABC supplement. The 1974 ABC catalog does have the 3093 case. As you determined it takes the 1222-5 crystal.  When I serviced my President 'A' (which also takes that crystal), I was able to fit a 29.8 crystal from my DPA crystal assortment. Those are, in my opinion, a great deal. The assortment comes with 10 sizes each from 27.8mm to 32.4mm in 0.2 increments. I pretty much use them for any non-armored crystal that takes a high dome crystal. I think they no longer make them but Cousins has still has some in stock but when I bought them they were around $40 for the set and now they are around $100. Still, at 40 cents a crystal it's still a good deal. For the large driving wheel, I remember I once assembled the keyless/motion works first and when I placed the large driving wheel it was interfering with the setting wheel on the dial side as the teeth were not fully meshing and it wouldn't fully seat. If that isn't the issue I got nothing and am looking forward to see how you solve it 🙂
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