While twists from the 1970s in circulated condition are occasionally found on the market, in mint condition they are one-off pieces and often one has the chance to acquire only once. The coin is struck with the stamps twisted against each other by about +80 degrees. In mint condition rare. In collections of coins of the last century, minted by machine in large numbers, it is not the quantity of coins that indicates the quality of the collection, but the number of gems in it, which include the curious minting errors (offsets, twists, reverses) created by accident.