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Old 22-04-2019, 11:15 PM   #4465
Senior Member
Join Date: Dec 2010
Posts: 2,111
How is 70hr power res useful? U donít wear freq?
These days ppl with desk job if winding not efficient, 120hrs power res also not useful
It's more than just the winding mechanism, the efficiency of the escapement plays a role too.
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