Check out this website - http://www.nkilgariff.com/

The fellow who runs or did run the site is Norman Killgariff. If you can figure out how to contact him, he has a Holdsworth serial number database. He should be able to tell you what model, when built, who built it and where. The trick is figuring out how to contact the man.

I did hook up with Norman on-line years ago regarding an old Holdsworth Equipe. He was very helpful and precise. Thanks again since his expertise put an arrogant pr**k in his place. Also, and this is important to me and my son, if you can figure out how to contact the gentleman, please let me know. We would like his advice regarding what we think to be a very nice Geoffery Butler.