The Chartered Bank, Hong Kong, a trio of $20, 1.1.1985 and 1.1.1992, serial numbers A837148, M616238, N682108,(Pick 279a, 279b), first prefix note graded PMG 67EPQ Superb Gem Uncirculated, the rest PMG 65EPQ Gem Uncirculated (3).
Estimate: 600 - 1000