10661 | 1912 C.I.P. 1/2c and 1c Statistical Department opt. “CHMK” variety stamps used group of 3
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Final Price: RMB 1,800
1912 C.I.P. 1/2c and 1c Statistical Department opt. “CHMK” variety stamps used group of 3，including inverted opt and basic stamp retouched character “One”，VF-F
