Diferent types. Around 6.000.000 mintage. https://moneditis.com/2016/05/22/rublo-рубль-ruble-1924/ Ag .900 weight: 20 g Diammeter: 33,65 mm
@moneditis I always cringe when I see that someone has to hold a coin by the faces with their bare fingers in order to take a photo. Did you know that you can buy these blue plastic tongs that are self-locking? They allow you to stand the coin on the edge while keeping both hands free to hold the camera. http://www.jpscorner.com/coin-cleaning-accessories.html#coin-tongs Chris