British Guiana 1856 Used 4c black on magenta with E.T.E.D. initials, SG24British Guiana 1856 4c black magenta, SG24, type 6 typeset provisional, with 'E. T. E. D.' initials of E. T. E. Dalton, cut square with good even margins and excellent colour and impression, lightly cancelled by large part DEMERARA circular date stamp, dated 'AU 1 1856'. Minor thin spots but a very attractive example of this popular classic rarity, particularly desirable with these initials, which have been recorded only on stamps used 1 5 July and 1