A super retro perpetual office desk calendar. Circa 1970s vintage...
A simple modernist piece of folded acrylic/perspex, in a smoky pale brown tone - typical of the 1970s era. It has gold numbers 1 to 31, over two rows, and a black slider with hole front and back to focus on an upper or lower number of the day. The folded black acrylic slider has grey felt inside to protect it from scratching the surface. Unknown maker and I can't find another like it.
Very good condition with no real signs of age. Two scratches to the front. Great on display and fully functional. Perfect to sit on a retro office desk, and ideal for a man-cave or as a 1970s prop. 
25cm x 8.5cm tall x 5cm deep. 
Includes P&P to the UK.