United States
usa-20180607-r-001
page = 1
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Width: 240 mm
Height: 104 mm
Location: Ice Hockey Volume CIX
Stamp ID = 5658
Commemorative cover celebrating the Washington Capitals win of the Stanley Cup in 2018.
Commemorative cover shows Alexander Ovechkin (On some French language stamps you might see the name spelled Aleksandr Ovetchkine.)
From Linn's "Stamp Issuing Entities Of The World" page.
United States of America (1847-)
Stamp-issuing status: active; Population: 248,709,873 (1990). Republic occupying the central portion of North America, along with Alaska, Hawaii and a large number of island possessions in the Caribbean Sea and the Pacific Ocean.