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Discussion Starter · #1 · (Edited)
I'm wondering how accurate the H21 caliber in the Hamilton X-patrol actually is (in sec/day), given all the modifications that transformed the 7750 engine into the H21 one. Any X-patrol owners (or people who "know how")?..

One more question. Is the H21 in X-Patrol hand-winding as well, or just auto self-winding?

Thanks in advance.
 
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