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

A great rarity, destructs of copper-nickel coins from the 1950s and 1960s are virtually unheard of on the market. Perfect condition.
Coin minted on an incorrectly cut disc by the die cutter. In coin collections 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).