Nickel Errors and Possible Die Trials. 1923. 10 Groszy reverse brockage on thin flan. Le Locle Mint. As Y. 11. Rare!...

Nickel Errors and Possible Die Trials. 1923. 10 Groszy reverse brockage on thin flan. Le Locle Mint. As Y. 11. Rare! BU. / / 1923. 10 Groszy uniface reverse strike on thin flan. Le Locle Mint. As Y. 11. Choice AU. It is possible that this is a reverse die trial (pattern). / / 1923. 10 Groszy die trial on very thin flan with two cancellation holes. Le Locle Mint. As Y. 11. AU. / / 1929. 1 Zloty with 7mm X 11mm oval-shaped depression (planchet flaw) obverse. As Y.14. EF. / / ND (1929). 1 Zloty blank planchet. Warsaw Mint. As Y. 14. Choice EF. Five (5) coins in lot.
In 1988, Mr. Karolkieivicz purchased, via private sale from Karl Stephens, these rare errors which came from the collection of Stanislaw Herstal. Mr. Herstal had a close connection to the Mint in the 1930's before he left Poland for Brazil. No doubt that is how he obtained these pieces.