Great Britain 1965 4d-1s3d Churchill Commemoration (Phosphor) imprimaturs, SG661/2p varGreat Britain 1965 4d 1s3d Churchill Commemoration (Phosphor) imprimaturs, SG661 2p var. A very fine unmounted mint, with full original gum, set of two imperforate imprimaturs with "NPM IMPRIMATUR" handstamps on reverse. Since the end of WWII there had been calls to celebrate Winston Churchill in philatelic form, but GPO policy stated only the monarch's head could appear on a British stamp. But when Churchill died in 1965, public demand won out, and