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Patek Philippe

answers

 

Whilst I have the 324 movement is looks very similar.

 

The 'unfinished' wheel on that rocks back and forth with the movement of the rotor actually has a very fine sort of perlage finishing and is silver in colouor.  I expect yours has the same finish.

The sliding bolt you referred to is actually a clutch which I beleive controls the hand winding vs automatic.  If you give the rotor a few anti-clockwise rotations you'll see the clutch disc move towards the middle.  Then  hand wind it and it will move back to the side.

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