Black and Red Perpetual Calendar

Description

Originally this was purchased from MOMA, and on their site it states the following to describe this calendar:
This boldly original calendar is designed to be used year after year. Simply move the two magnetic balls to mark the date and month. Made for the Museum of injection-molded plastic and magnets it can be wall-mounted or used on a desktop.
Black and Red Perpetual Calendar. Condition is "Used". Shipped with USPS First Class.
size:
9"H x 13"L x 2"D