Bank of China, a group of 5x 100 yuan, 1940, Chungking, consecutive serial numbers Y557342 - 7346, (Pick 88b), graded PMG 64 Choice Uncirculated, 64EPQ Choice Uncirculated, 65EPQ Gem Uncirculated, 64EPQ Choice Uncirculated and 66EPQ Gem Uncirculated. Only two of such notes graded higher than 66EPQ in the PMG population report (5).
Estimate: 3500 - 5000