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I assume you mean the bridge where the centre seconds pivot sits? If so, the pivot may sit slightly below the bridge surface, especially if in a jewel. In which case you need a more pointed tool which actually sits on the end of the pivot. Hence my post above about using jewelling/staking stumps. -
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By RichardHarris123 · Posted
What's the purpose of the slot in the bought one? -
By rossjackson01 · Posted
That all? Plastic pill top, small screw through centre. Made. -
By nevenbekriev · Posted
Ok, with the parts You have, the easiest thing to do is vibrate a new hairspring, of cousre for 16800 BPH. A couple of balance screws will be not enough, at least 3-4 aditional couples will be needed. And this if You have that many free holes. And cutting 75 teeth table for the contrate wheel is the other reasonable option Different things may have happened to the clock - the contrate wheel may have be replaced from another modification, the platform may not be original, the hairspring may have been replaced and vibrated for 18000 or the entire balance may have been replaced wit the wrong one...
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