I have a perpetual calendar from between the 1940's - 1960's.  It is the same design of Niagara Falls, Canada on both sides.  You spin the round calendar and the date changes. There are 2 smaller dials on the sides with a smaller dials below on the base with the month and day of the week to be selected.  The bottom is lined with felt (a bit worn/faded).  This is in fair condition with moderate paint/finish fading on both sides.  The chrome colored metal on the base has some "pitting" on the finish.  It has some overall wear showing.  I would consider this in fair condition.

Perpetual Calendar Niagara Falls Vintage