When I did an online piece for Premier Guitar magazine about a year ago, a guy contacted me and told me the guitar on the cover of the Rittor book was originally his and his father sold it without his knowledge. He had tracked it to Canada but the owner was not communicating. He gave me the serial no. -- AH585 -- and I found it entered in the Register.collin wrote: Do we know the serial number on the Rittor book guitar? Can we assume it's still in Japan? Mine is the first one listed in the register there, guess I need to update the location!
See the comment here, by Frederick Dee, scroll down: http://www.premierguitar.com/Magazine/I ... World.aspx

