Following the "Specialized catalog of Polish coins of the 20th and 21st centuries". by Mr. Jerzy Chalupski, we come across the following: "August 26, 1939. The President of the Republic of Poland signed a decree published on the same day introducing steel coins with denominations of 20 and 50 groszy into circulation. The steel 50-groszy coins were to be introduced into circulation and function in parallel with nickel coins."
A coin so far erroneously attributed to the General Government, but actually minted already during the Second Republic. This is very nicely described on his blog "Zbierajmy Monety", by Mr. Jerzy Chalupski: "In all, with two exceptions*, catalogs of Polish coins of the 20th century, the authors placed it in the sections of foreign coins minted for Polish lands. It is customary to speak of the fifty-grosz coin of the General Government.
The truth is different. It is a legal Polish coin introduced into circulation in the last days of the Second Republic. Despite irrefutable evidence of the above, despite the existence of legal acts, accounts of mint employees and press publications from 1939, the misconception still persists that this is an issue of the General Government."
