GREAT BRITAIN 1964 (MNH) 3D BOTANICAL CONGRESS SIGNED CYLINDER BLOCK
3d Botanical Congress ordinary cylinder 3A.–1B.–1C. block x 4 signed in the lower margin by stamp designers Michael (1921–2009) and Sylvia Goaman (1924–2006). Scarce. Fresh and fine. Mint never hinged. SG655; SC414
