GUYANA 1981 (MNH) 15C ERYPHANIS POLYXENA WITH NON-SERIF OVERPRINT
15c Eryphanis Polyxena single with non-serif type I 'ESSEQUIBO IS OURS' overprint. Fresh and fine. Mint never hinged. SG808; SC391a
Note: originally issued 1 October 1978 without overprint as part of the Butterflies definitive series
