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desc_issuer: China desc_issue: 1939 secret marks desc_denom: 50c desc_print: Dah Tung desc_denom2: 50c (# 12740) Used by 1 overprinted stamp: Inner Mongolia postage 7/1/1941 50c dkbl issue=1941d d=Sun Yat-sen (1938) var=secret mark ovpt=a oc=blk on=issuer=China-issue=1939 secret marks-50c-pr=Dah Tung unwmk perf=14 Matches 1 type: China postage 12/6/1939 50c dkbl issue=1939 secret marks d=Sun Yat-sen (1938) var=secret mark unwmk perf=14 |