ROKR Perpetual Calendar

$23.99

ROKR is a mechanical gear kit made from laser cut wood. This beautifully designed Perpetual Calendar allows the calculation of the day of the week for a given date from the year 2018 to 2040. Simply pop out the wooden pieces and assemble together without glue or tape.

In stock

GTIN: 6946785165180 SKU: RBTM-LK201 Category: