Buck and Ryan
Tool Merchants of 326, 312 & 332 Euston Road and 261 Edgware Road.
1919 Tools. 
1936 Listed as London's leading tool merchants, 'lathes tools and chucks, with everything for the model worker on exhibit'
Sources of Information
- Mechanical World Year Book 1919. Published by Emmott and Co of Manchester. Advert as loose insert.
- April 1936 advert