This guitar is a very early Rickenbacker acoustic build by Studio California, dating to mid-2006. It also represents the first use of the distinctive gold Studio California acoustic pickguard that encircles the sound hole. It has an Engelmann spruce top and AAAAA flamed maple sides and book matched back. It set both style and quality standards for the series of Rickenbacker acoustic guitars, and (later) the Madeleine Strings acoustic series that continues through to the present day.