Canada
can-19830507-k-001
page = 1
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Width: 160 mm
Height: 90 mm
Location: Ice Hockey Volume X
Stamp ID = 4037
ORAPEX stands for Ottawa RA Centre Philatelic Exhibition. Each year a commemorative show cover and franking is produced. The 1983 cover celebrated the 90th anniversary of the first awarding of the Stanley Cup with a cachet showing Lord Stanley and the cup.
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.