cover 1900 produced photographically, 21mm. wide, 3d. pale blue on blue, a magnificent example from the top right corner of a sheet showing marginal plate sign, fault in sheet margin at top right, on local XU5 (heavy central reinforced filing crease and address partially touched in), cancelled by c.d.s. (26.4). Very fine and desirable. B.P.A.Certificate (1993). Ex Sir Maxwell Joseph. Photo in colour.