greetings all-been a few months since I've visited hope all is well with everyone. question: do any charts exist telling of American screw thread sizes for vintage pocket watches? I seem to be having a tough time finding anything other than the fact that back then prior to the 1955 "thread summit" I'll call it, where the European and American powers-that-be agreed on a universal standard thread pitch across the board(UNM miniature), that European was metric and American was their standard inch pitches, with the exception of Elgin and Waltham, who made their own specific(adding to my frustrating confusion) threads. I have threaded holes I need to repair and/or chase, and I'd just like to have it handy if I need it. maybe I haven't looked deep enough?
I recently bought a lot of pocket watches on Ebay.
Between them I found an Alpina pocket watch with movement UH 1116. I saw on internet that usually is referred as Alpina 1116.
I got the following situation, while removing the wheels bridges, one of the ruby remained on the wheel.
Please take a look on the following pictures.
I also took some pictures with a microscope in order to explain better the situation.
Could you please suggest me what I should do?
Is what I got complete? Looking to another ruby it seems there is something missing (holding piece?)
Is the movement common? Do You believe I can find the bridge somewhere?
BTW I have also found a broken spring
Many thanks in advance for your suggestions
A friend of my father gave me this old pocketwatch to see if I could repare it.
As you see in the picture, the balance wheel is extremely bent. I tried to bend it back, but i cant make it good enough.
Does anyone know where I can find a balancewheel for this Revue 30 movement? I have tried to search around online, however, I cant find any.
Is there a generic balance that would fit in here?
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Hi KO, Thanks for the reply. The movement is a straight up FEF 380, no date. So if I understand you correctly, metric strength of .11 is too high, so if I go to .10 I should be in the ballpark? I found one at O. Frei but although the metric strength was lower, the Dennison strength was higher at 11. Would that matter? Pasted below are the numbers for that mainspring.