Perpetual Calendars

De Bethune DB25QP
De Bethune
By Adam Craniotes
2010: De Bethune DB25QP, the first QP with 3D Moon Phase
Feb 21, 2020
Patek Philippe Ref. 1591 in Stainless Steel (Image © Revolution)
Patek Philippe
By Wei Koh
1944: Patek Philippe Ref. 1591, first Water Resistant Perpetual Calendar Wristwatch
Feb 4, 2020
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