Seamaster 300 cal 552 - how many turns of crown for full manual wind

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When I wind a 300 with cal 552 auto movement, I don't hear any indication (such has clicking) that it is fully wound. Does anyone know, approximately, how many turns of the crown is needed for a full manual wind on a 165.024?
 
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The mainspring in an automatic watch is not fixed. It slides by friction when fully wounded.
15 to 20 normal turns should do it.