The Bristol Historical Collection consists of two designs.  The Spitfire R6753 which incorporates an actual airframe artifact from R6753, a Spitfire which flew in combat during the Battle of Britain.  And the B-25 Mitchell incorporating original airframe material from a WWII B-25 SN# 44-30734.  This rather famous aircraft, "Panchito", can still be seen flying at airshows around the country today.