China
People's Republic silver 2-Piece PCGS-Certified "Summer Olympics" Proof Piefort Partial Set 1980,
1) Equestrian 30 Yuan - PR62 Cameo NGC, KM-P13
2) Football 30 Yuan - PR62 Cameo PCGS, KM-P14
Sold without the Archery 15 Yuan and Wrestling 20 Yuan that would complete the set.
HID02901242017
Estimate: 1200-1600 USD