Old puzzle from Eastern Germany. It consist of two wheels top- and pbackward of a brown base plate, which allow to move some covered pieces inside. The pieces are coloured in green, yellow, red on one side. The back side has white coloured pieces, which have numbers attached on it (0 .. 9)
Red pieces: 1 .. 3
Yellow: 4 .. 7
So you can eithe solve colours or numbers only or bring both sides in order.
Got mine as a gift from Celia Seide in August 2011 (thank you very much). Some silicone improved the movement a lot!
Size: length 8.5cm, width 6.2cm, 9.5mm thick