People's Bank of China, group of 4x brass proof 1 yuan, 1980, issued for the Winter Olympics, Speed Skating, Figure Skating Alpine Skiing and Equestrian,NGC PF68 Cameo, PF66 Cameo, PF67 Cameo and PF68 Cameo respectively, #3944505-034, #3944505-050, #3944505-014 and #3944505-067. (4).
Estimate: $2,000.00 - $4,000.00