1961 CORRY PA CLIMAX LOCOMOTIVE 1681 100th ANNIVERSARY CENTENNIAL 1ST DAY COVER
So I am not a first day cover or stamp expert, I'm sure those knowledgeable will know what this is
1861-1961 100th anniversary , Climax Locomotive 1681 (built 1927) Donated to Public Display at Mead Park by Citizens of  Corry
Envelope and folded brochure history