Great Britain 1939 (FDC) 10s King George VI high value Arms definitive, dark blue shade, on plain registered cover with circular KNOCK, BELFAST cancels dated 3 OC 39, almost a month before the official 30 October 1939 release. Additional three strikes on reverse. Very rare. Fine. SG478; SC251; BC52evar
Great Britain 1961 (FDC) Parliamentary Conference single on plain cover with 'Post Office Savings Bank' slogan and obliterated SHEFFIELD circular cancel dated 22 SEP three days before official release.
Great Britain 1994 (FDC) £5 Windsor Castle definitive, printed by Harrison from re-etched plates on non-fluorescent coated paper with PVAD gum, on illustrated guaranteed delivery cover with BEESTON, NOTTINGHAM circular cancel dated 16 AU 94, the earliest known usage. Extremely scarce. Superb. SG1614var; SGUK16; SC1448var
Great Britain 1936 (FDC) King Edward VIII definitives on plain cover with NEBWORTH, HERTS circular cancels dated 1 SEP the first day of issue of the ½d, and but 13 days before the official release of the Very unusual.