CANADA 1950 1c to 4c (both colours) Officials, SGO178/83Canada 1950 1c to 4c (both colours) Officials, range of 78 different (!) corner plate blocks of 4, comprising 1c x 14 (sets of 4 from plates 1, 2 and 5, plus upper left examples from plates 4 and 6), 2c sepia x 8 (sets of 4 from plates 1 and 2), 2c olive green x 12 (sets of 4 from plates 3, 4 and 7), 3c purple x 22 (sets of 4 from plates 3, 4, 8 and 10, plus three each from plates 6 and 7), 4c carmine lake x 14 (sets of 4 from plates 4, 8 and 9, plus