China
People's Republic Four-Piece "Lake Placid Winter Olympics" Proof Piefort 30 Yuan Set 1980, 1) Speed Skating - PR68 Cameo NGC, KM-P152) Alpine Skiing - PR67 Cameo NGC, KM-P163) Biathlon - PR68 Ultra Cameo NGC, KM-P174) Figure Skating - PR68 Cameo NGC, KM-P18A superb set, all coins bright and untoned with deep-mirrored fields and excellent cameo contrast.
Estimate: 5000-6000 USD