Kenny Kramer Signed Leonard Coleman Baseball Jerry Seinfelds Neighbour AutographKenny Kramer signed Leonard Coleman era baseball. Kenny Kramer was a local comedian in New York that provided the inspiration for Cosmo Kramers character in the show Seinfeld. Kramer was Jerry Seinfelds neighbour in real life while he was creating the show Authenticated by JSA, certification #AP07273 Excellent condition; little to no notable handling wear. Autograph presents well with no smudging, bleeding or fading Follow us on Instagram and Facebook