Uploaded April 2023 | Updated September 2026, 2 weeks ago

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Step-by-step assembly guide of quartz-movement based perpetual calendar clock,
youtu.be/NlWzzdal9S4

Explanation of the perpetual calendar mechanism (based on the former design) is at
youtu.be/KIj4TTMFhdc

Instructions and the 3D data is available for free at
instructables.com/Quartz-movement-Based-Perpetual-Calendar-Clock
thingiverse.com/thing:5980536
printables.com/model/457543-quartz-movement-based-perpetual-calendar-clock
makerworld.com/ja/models/1266134-quartz-movement-based-perpetual-calendar-clock