Sinkiang CSS SK117-125 1933 - Peking Overprint on Single Circle Dr. SYS 2c, 4c, 5c, 15c blue green, 15c scarlet, 25c, $1, $2, $5 (not listed in Scott)

Sinkiang CSS SK117-125 1933 - Peking Overprint on Single Circle Dr. SYS 2c, 4c, 5c, 15c blue green, 15c scarlet, 25c, $1, $2, $5 (not listed in Scott)