Stan Lee Signed Marvel THOR Hammer PSA/DNA COA Autograph Avengers Comic ToyAutographed Official Marvel Toy THOR Hammer. Signed on April 13, 2013 in City of Industry, California. The Item Has been Authenticated By PSA/DNA. PSA/DNA is the Top Third Party Authenticator and is Ebays Pre Certified Authenticator. And comes With a PSA/DNA Certificate of Authenticity! […]