You are invited to purchase a 50 zlotych coin of Poland commemorating the Polish King, Jan III Sobieski and the 300th anniversary of the Relief of Vienna from the Ottomans siege in 1683.

Dia. 30.5 mm
Metal: CuNi
Weight: 11.7 g
The coin was minted in 1983. 

 Siege of Vienna, (July 17–September 12, 1683), expedition by the Ottomans against the Habsburg Holy Roman emperor Leopold I that resulted in their defeat by a combined force led by John III Sobieski of Poland. The lifting of the siege marked the beginning of the end of Ottoman domination in eastern Europe.