essay -- a similar top marginal pair but the left-hand stamp perforated on two sides and the right-hand stamp being a composite essay for the wording of the proposed Reply Paid stamp, with printed tracing paper overlays for "UNITED KINGDOM", "THIS HALF NOT/VALID/APART FROM THE OTHER" and "Not Saleable", and pencil manuscript "2½ REPLY STAMP"; the pair severed and rejoined with hinges, fine. Unique. Photo