This is a beautiful souvenir sheet consisting of 1 stamp, issued by Guinea-Bissau in 2007, honoring the 50th anniversary of the first dog to fly to space. Featured on the sheet are the dog Laika and the Sputnik 2 spacecraft that took this historic launch, as well as Soviet rocket engineer and designer Sergey Korolyov. The sheet is Michel catalog #3687/Bl.624, and is Post Office fresh, mint never hinged.