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desc_issuer: El Salvador desc_year: 1918 Related descs: issuer=El Salvador-1917 issuer=El Salvador-1919-1col Not used by any overprinted stamps. Matches 3 types: El Salvador postage 1918 1c grayvio dt=National Theater ovpt=a oc=vio on=issue=1916-6c unwmk El Salvador postage 1918 1c grayvio dt=National Theater ovpt=b oc=vio on=issue=1916-6c unwmk El Salvador postage 1918 1c grayvio dt=National Theater ovpt=c oc=vio on=issue=1916-6c unwmk |