20th Anniversary, Staff - White Ceramic Square with silk screened design of Guitars & "1971-1991", Boxed F.C. Parry. According to the 'Treasures Of The Hard Rock Cafe' What was left over from staffs 'hand out' were sold over the counter. Back: Boxed 2 Lines print. Sand Pattern. This pin was only distributed to staff members. Base Material is Gold Appearance.