Canada
can-19810000-b-001
page = 1
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Width: 232 mm
Height: 156 mm
Location: Oversize album #1
Stamp ID = 4416
Business envelope for the Western Hockey League.
From Linn's "Stamp Issuing Entities Of The World" page
Canada (1851-)
Stamp-issuing status: active; Population: 29,123,194. An independent state within the British Commonwealth, occupying the northern part of North America.