1d Mulready Envelope (A189).
1840 (22 May) from Torquay to London, bearing 1d Black, Plate 1a, G-B, with large margins and neatly cancelled with a red Maltese Cross. 'TORQUAY MY 22 1840' c.d.s. and boxed 'NO 1' handstamp, all on the front.
Royal Certificate.
Exceedingly Rare and Attractive.