A signed guitar pickguard, autographed in-person by Jon Anderson (vocals) of Yes. In-Person Signature. Authentication: ACOA Certification Number: RA71278 Collector Note: Signed guitar pickguards featuring Jon Anderson are highly desirable, representing the legendary vocalist and founding member of Yes, one of progressive rock’s most influential bands. Authenticated in-person signed guitar memorabilia are especially sought after by collectors of classic rock and prog-rock memorabilia. A display-ready, standout collectible from a true progressive rock icon.