GREAT BRITAIN 1969 (VARIETY) 4D CONCORDE BLOCK WITH OIL SLICK FLAW
4d First Flight of Concorde block x 4 with top right stamp affected by oil slick flaw. Fresh and fine. Mint never hinged. SG784var; SGW147f; SC581var
Note: the oil slick flaw occurs on column 2, row 13 of sheets
