Great Britain 1938 4d blue Postage Due imprimaturs, SGD43var Cameroon stamps a work that set the

a work that set the template for modern physics

(trace of hingeing at centre of each block only)

horizontal pair of this rare adhesive with the merest hint of a previous stamp hinge mark

To the left of the signature is a light Warner Bros

Great Britain 1938 4d blue Postage Due imprimaturs, SGD43var Cameroon stamps a work that set theGreat Britain 1938 4d Blue Postage Due, SGD43var Imperforate Imprimatur Pair A superb unused unmounted mint with full original gum horizontal pair of the 1938 4d Blue Postage Due issue, as a rare imperforate imprimatur. These stamps originate from the National Postal Museum Archive and bear the "NPM IMPRIMATUR" handstamps on the reverse marking their official status and exceptional provenance. Extremely rare in this format. Provenance: Ex. National