RR-, 10 Gold 1965 7th Centuries of Warsaw - Nike, DESTRUKT, disc punching error

A great rarity, the destructs of the 1950s and 1960s copper-nickel coins are virtually unheard of on the market. Perfect condition.
The coin was struck on an incorrectly cut disc by a die-cutter. In collections of coins of the last century, struck by machine in great quantities, it is not the quantity of coins that indicates the quality of the collection, but the quantity of gems in it. There is no higher grade of gems than low-volume SAMPLES, and even rarer to them, created by accident, interesting minting errors (offsets, reversals).