Watch List notes:

1980, Winter Olympic Games, 30 yuan, complete set of four piefort proof silver coins, weight 30g x4 (0.850 silver), ASW 3.28oz, each coin is in plastic capsule housed on original box with COA. The certificates mentioned mintage of 1,000 pieces for each, but actually only 500 complete sets were produced, rare and highly desirable item of the Chinese Numismatics (Est. $12,500-$15,000), KM #P15‑18