Canada
can-19680703-as-005
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Width: 20 mm
Height: 36 mm
Perforation: Perforated on 2 sides: horizontal 10.00 x 10.00
Location: Lacrosse & Ringette
Stamp ID = 203
Imperforate on two sides: top and right side of stamp. Found only on field stock sheet. See can-19680703-as-001 for more details.
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.