Website: thingiverse
Author: shiura
Price: Free Download
File format: .Stl 3d printable
Description:
This calendar automatically keeps the day of the week correct for a year, from March 1st to the end of February in the next year. Contrary to the incremental mechanism of perpetual calendar in fancy mechanical watch, any drum can be rotated arbitrarily to any direction (CW and CCW), endlessly. It is useful to check the