GUYANA 1981 (MNH) PARCEL POST OFFICIALS TRAFFIC LIGHT BLOCKS
$1 Chelonanthus Uliginoides 'PARCEL POST' traffic light blocks x 4 with additional 'OPS' overprint in red for official use (2 items). Fresh and fine. Mint never hinged. SGOP1/OP2; SCQO1/QO2
