Janis Joplin Signed 4x6 Handwritten Envelope Postmarked 1965 PSA/DNA Slabbed

This Autographed Postmarked September 20, 1965 4x6 Handwritten Envelope has been Personally Signed by Janis Joplin. This item is 100% Authentic, it comes slabbed and authenticated by PSA/DNA. The authenticity can be verified on Professional Sports Authenticator website.