Industry: Music,Signed: Yes,Autograph Authentication: James Spence (JSA),Object Type: Guitar & Guitar Pick,Original/Reproduction: Original,Country of Origin: United States Signer: Bruno Mars Item Type: Full Size Autograph Edition Les Paul Style Guitar Guitar Size: 39in in length Item Certification: This item is guaranteed authentic and has been certified authentic by James Spence Authentication (JSA) the leading authority on autograph authentication in the entire world! It has been affixed with a tamper proof hologram with unique serial number that can be verified in the JSA database. It comes with a matching certification Letter. Buy with confidence from a trusted source in the autograph industry!