My 645 has the part number 4732 14 set teeth - 15 clutch teeth positive setting clutch and the part number 4785 winding and setting arbor with the part number 4730 clutch. What is the trick to install this assembly into the movement? I have tried multiple ways to insert the assembly into its spot in the plate without success. If it helps, the estimated production year for this Model 1908 watch is 1908.
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