Len Partridge, (an early influence on Bert Jansch) in Edinburgh, has a Grimshaw 12-string. Cyril Davies had the first, Len the second after comparing Cyril's with the Regal owned by Rory McEwan.
I owned it for a while but gave it back to Len because I had enough trouble with six strings.
Len's version of "The Bells of Rhymney" was a hair-raiser at the old Howff in Edinburgh back in the late fifties!

Eddie