CANADIAN STAMPS
1942
SG 375 to 388
War Effort
Issued 1942 to 1948. Printed recess on unwatermarked paper and perf 12.
SG 389 to 393
War Effort
Issued 1942 to 1943. Coil Stamps, imperf x perf 8
SG 394 to 396
War Effort
Issued 1942 to 1948. Booklet Stamps, imperf x perf 12
SG 397 to 398a
War Effort
Issued 1942 to 1948. Booklet Stamps, imperf x perf 12
SG 399 to 400
Air Mail
Issued 1942 and 1943. Perf 12
SG S12 to S14
Special Delivery Stamps
Issued 1st Jul 1942 to 1943. Perf 12
In May 1923 Canada began issuing official stamps for use by the Receiver General's department in Ottowa and by the Assistant Receiver General's Office in the Provincial cities, these were regular stamps perforated "O.H.M.S". From 1 July 1939 all departments of the federal government began using these stamps until 1949.
The perforation can appear in several ways, either upright, inverted or sideways. There are many known examples of forged stamps where the 'O.H.M.S' was applied to used stamps. Genuine examples can be detected by signs of the cancellation ink leeking into the perforation holes.