1980年第13届美国普莱西德湖冬奥会银币,加厚版,均NGC UNC Details-PF67,少见;Peoples Republic of China, group of 8 silver PIEDFORT coins, 1980, Lake Placid Olympics: Alpine Skiing, Figure Skating, Biathlon and Speed Skating, all with a denomination of 30 yuan, Olympics: Football, Equestrian, Wrestling and Archery for 30yuan, 20yuan an 15yuan respectively,NGC UNC Details surface hairlines to NGC PF67, viewing recommended. A scarce set despite the rather low grading scores (8)