A signed guitar pickguard, autographed in-person by Tim Mahoney (guitar), Nick Hexum (vocals/guitar), Chad Sexton (drums), and Doug “SA” Martinez (vocals/percussion) of the band 311. In-Person Signature. Authentication: ACOA (AutographCOA) Certification Number: RA78611 Collector Note: Multi-signed instruments and memorabilia from 311 are highly desirable, featuring key members of the band. Signed pickguards are especially rare and sought after by collectors of music memorabilia and fans of alternative rock. A display-ready, standout collectible from one of the most influential and enduring rock bands of the 1990s and beyond.