STAMP #:C3h, C3
MINT/USED: 
TYPE: Pair
GRADE: VF
DESCRIPTION:35c red. Top stamp (C3h) VF, 1½mm between 'AIR' & 'MAIL'. Period after '1921'. NH. Bottom stamp C3, VF, NH. A rare se-tenant pair. 2018 AIEP Certificate.
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