Sir Winston Churchill 1968-1986
Regular and Airmail Stamps (December 23, 1968)Exists perforated and imperforate. As the only value in the set the imperforate 1.50 G stamp was printed in colors differing from its perforated counterpart.
Souvenir Sheet (December 23, 1968)
Surcharge 1986 (April 18, 1986)known canceled March 18, 1986 (see HP 12(3), p. 53)
Surcharge 2000This overprint is most likely not a postal issue but a misprinted revenue stamp!