Poland -Polish Kings and Princes - Stanisław August Poniatowski (1764-1795) 2005 Proof Silver 10 Zlotych 32mm (14.14 grams) .925 Silver (0.4205 oz. ASW) Reference: Y# 553 RZECZPOSPOLITA POLSKA mw 2005 ZŁ 10 ZŁ, Crowned eagle above value. STANISŁAW AUGUST PONIATOWSKI 1764 1795 Stanisław August Poniatowski and shadow.