Description on the web site:
100 rubles 1992, rev: Fifty rubles - BANK OF RUSSIA. Bimetallic, the central insert - copper-nickel alloy, the rim - brass, 6.01 g. Almost perfect preservation, patina. Fedorin, pp. 254. Rylov, sable, pp. 157. Extremely rare and interesting specimen.
This coin is a so-called "pereputku" - it was the result of confusing dies for different denominations - and, obviously, is the product of erroneous coinage. To paraphrase the well-known domestic numismatist and researcher V. N. Nasticha, well, where else but in our unique country, would you find a coin, the reverse of which can be exchanged for two obverses?
Peter