LEITH EXPERIMENTAL DUPLEX TYPE 4 IN BLUE/PL.38(SG33)(II). Good used 1856 die 2 1d pl.38 orange-brown on blued paper (SG33) lettered II, several shorter perforations and a little off centre but cancelled very fine large part strike '221/LEITH' experimental duplex type 4 in BLUE. RARE. (Ref 90535).