Canada
can-20110926-z-001
page = 1
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Width: 217 mm
Height: 273 mm
Location: Details #1
Stamp ID = 2313
Front cover of the #4 2011 issue of Canada Post's magazine "Canada's Stamp Details". On page 8 is a 1 page article about the commemorative envelope for the Montreal Museum of Fine Art:can-20110926-t-001.
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.