GREAT BRITAIN 1973 (VARIETY) 3P BRITISH EXPLORERS BLOCK WITH TURQUOISE-BLUE SHIFT
3p British Explorers block x 4 with major shift of turquoise-blue resulting in the faces of David Livingstone and Henry Stanley being partially obscured by the background maps. Minor gum bends otherwise fresh and fine. Mint never hinged. SG923avar; SC689var-690var
