Great Britain 1840 1d Mulready envelope & 2d Mulready letterhead, SGME2/3 Literary Very fine unmounted mint with

Very fine unmounted mint with full original gum top marginal block of four imperforate imprimaturs with 'NPM IMPRIMATUR' handstamp on reverse released from the National Postal Museum

in very good condition

A superb mint example of the 1882 5 shilling from the rarer printing plate 4 on blued paper

with part of the flap missing

Great Britain 1840 1d Mulready envelope & 2d Mulready letterhead, SGME2/3 Literary Very fine unmounted mint withGreat Britain 1840 1d Mulready envelope (Forme 4, Stereo A175) & 2d Mulready letterhead (Stereo A99), SGME2 3. Very fine unused pair of Mulready's, both endorsed in manuscript at foot "Proof" over value tablet. Scarce examples from the dawn of the prepaid postal system. Provenance: Ex. Shaida & "Mayflower" Gold Medal Grand Prix Collection. Accompanied with a 1994 British Philatelic Association Certificate of Authenticity (in respect of the 2d