There are tid-bits in Douglas Tate's chapter on Holloway & Naughton, and some pretty good stuff on pages 41-42 of Nigel Brown's Vol.2 under the heading "Holloway & Co/ G & S Holloway Ltd - Birmingham".

Probably too much to reproduce here. Can you get access to these books? If not, give me a call, mate. I'll bring 'em to the next collector's meeting.