R, 100 gold 1966, Mieszko and Dabrowka, destruct, Fading Goslawski inscription

A very rare coin with a fading of the Designer's name (Goslawski). This is not an abrasion on the coin but a destruction of the stamp. In collections of coins of the last century, struck 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 curious minting errors created by accident.