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Speedmaster trivia question
Does anyone know what the power reserve is on a cal. 321 movement? 
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Speedmaster trivia question
Does anyone know what the power reserve is on a cal. 321 movement?
Merci!
Thanking you kindly! I guessed from my rather rough estimation ~50hrs, having only let it stop once for a brief trip to the slopes of New Zealand. Methinks it does not snow on the moon. Better to leave Speedy at home : )