Perpetual Stone Calendar

Circa 1960s green veined black marble perpetual desk calendar, featuring the 7 days of the week on one stone, and numbers on the other two. The numbers are debossed and painted in gold, the days of the week in gold and Sunday in red, in a wonderful typeface. Brown wood stand. Some chips to the marble and signs of wear appropriate for age and use 

4 1/2" width x 2 1/2" height x 2 1/4" depth