cover 1840 (30 Sep.), stereo largely obscured by seal but probably A64, printed Milton Press 'puffer' advertisement inside (S.G. Spec. MA117b), addressed to Hertford and showing superb strike of the very rare bright violet Maltese Cross, showing "MARKET STREET" and London backstamps; some slight creasing but fine and a superb exhibition item. B.P.A. Certificate (1996). Photo