Disc with measures and three mobile circles. In the middle, Games emblem surrounded by the month of the year in russian. Caption: "Leningrad 80 - Olympiada 80".On the back a table to calculate the results. At the top, the inscriptions in Russian: " The biorythm; Price: 3r. 25 kop. ; art. S-L6-2031a-OL", on the lower part and on the sides the words: "emotional" ; "intellectual" et "physical". On the lower part of the table: "Rythms: physical, emotional, intellectual", and cyles: 23 days ; 28 days ; 33 jours".

metal, plastic

multi coloured, red, blue, yellow

ø 12 x 1.4 cm, 83 g