vintage sterling silver frame perpetual calendar. Each month all you have to do is change the card around for the appropriate date. So easy. or can be used as a frame. It measures 3 3/4" wide by 3" tall in the original Tiffany protective sleeve I do have the bottom of the box although I am missing the lid. The only issue I do see is for some reason they gave the same dates on 2 cards so a another card will need to be found in order to have all 12 months complete