Antigua 1961 (Variety) 1c English Harbour imperforate proof block
ANTIGUA 1961 (VARIETY) 1C ENGLISH HARBOUR IMPERFORATE PROOF BLOCK 1c English Harbour imperforate proof block x 4 in slate. Ex De La Rue archives. Very scarce. Folded though lower stamps and some wrinkling otherwise fine. Mint never hinged. SG121avar; SC108var