Antigua SG 40 1902 5s master die proof Before Hardening

1902 (22 Dec) master die proof for 1903-07 5s with uncleared surround and country name blank, complete design (frame and vignette), in black on glazed card (92x61mm), H/S date at upper left and 'BEFORE HARDENING at upper right. A rare and important proof. (This design was also used for Dominica and Montserrat). - P267001772