2 Klasse.2 Klasse.PRODUKTION Leningrad Mint (LMD). Var.1. The nature of the back surface has a more or less pronounced concavity in the center. There is evidence, such as a large, deep depression, and with a slight indentation. Article 1. Stamp "Монетный двор" formed in two rows and applied a single blow. The letters on two lines is almost the same stigma. The serial number is located prick and made away with the Stamp.