POLAND. Silver Proof Commemoratives (4 Pieces), 1976-2005. NGC and PCGS Certified.An interesting gathering for the eclectic collector looking for various subject matter.1) 200 Zlotych Proba, 1980. NGC PROOF-69 ULTRA CAMEO. KM-Pr411.2) 100 Zlotych, 1976-MW. NGC PROOF-69 ULTRA CAMEO. KM-Y-84.3) 100 Zlotych Proba, 1978-MW. NGC PROOF-69 ULTRA CAMEO. KM-Pr323; P-376a.4) 20 Zlotych, 2005-MW. PCGS PROOF-69 DEEP CAMEO. KM-Y-542.