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desc_issuer: Spanish Guinea desc_issue: 1931a desc_denom: 20c Used by 2 overprinted stamps: Spanish Guinea postage 1931 20c grayvio issue=1931b d=porter ovpt=REPUBLICA//ESPANOLA oc=blk on=issue=1931a-20c unwmk Spanish Guinea postage 1933 20c grayvio issue=1933 d=porter ovpt=Republica//Espanola oc=blk on=issue=1931a-20c unwmk Not used by any images. Matches 1 type: Spanish Guinea postage 1931 20c grayvio issue=1931a d=porter unwmk |