I have copies of a December 1976 retail catalogue and price sheet sent out by J. Johnson Guns, Norbury, London for sale. Each catalogue is 17 double sided pages, plus a price list.
Guns from the Milbro/Diana, Webley and Scott, ASI, Original ranges (amongst a few others) are included, with a complete price list giving both RRP and "our price" figures. The whole gives an interesting insight as to what was available on the British market in the pre Airgun World era.
The sheets are photo-copies of the original sheets, and I'd like £5 per copy, including postage.