Gruebel Forsey QP a Equation

The dial of the QP à Équation indicates leap years, the 24 hours of the day and night, the day of the week, the large date, the month, the hours, the minutes and the seconds, as well as the chronometric 72-hour power reserve.

GruebelForseyQP a Equation

CREDIT: GruebelForsey.com

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