A very interesting value.
A 1939 test token of the Mint of Poland. Made on a 1938 50-penny disc, in new automatic presses, purchased by the Mint in 1937.
At former auctions sold among the test coins of the Second Republic.
An extensive historical sketch for the 1938 50-grosz issue is available at Collecting Coins.
Obverse and reverse: inscription 16.III.39 NOWE AUTOMATES M.P., in the rim: THE TIMES OF THE LABOR RACE ARE GOING*.
Nickel-plated steel, diameter 23 mm, weight 5.01 g.