Guinea
gui-20170910-w-001
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Stamp picture
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First day of issue: September 10, 2017
Occasion: 2017 Men's World Ice Hockey Championships,2017,Cologne & Paris,Germany & France
Width: 148 mm
Height: 100 mm
Perforation: Perforated 13.50 x 13.25
Location: Ice Hockey Volume LV
Stamp ID = 5223

Souvenir sheet shows Sebastian Aho
Souvenir sheet shows Stéphane Da Costa
Souvenir sheet shows Artemi Panarin (On some French language stamps you might see the name spelled Panarine.)

From Linn's "Stamp Issuing Entities Of The World" page.

Guinea (1959-)
Stamp-issuing status: active; Population: 7,405,375. Republic in West Africa.