Thompson Chain Wrench 1929 Reg No. 731012 Newcastle Upon Tyne 12" Cecil Thompson Chain Wrench 1929 Reg No. 731012 Newcastle Upon Tyne 12" Cecil Great condition for age. The only reference I can find to this online is the following from a 1929 Wheels Of Industry Catalogue: Known as the Cecil Thompson chain wrench is a new tool capable of being applied to a number of tasks. It can take the place of various adjustable and fixed spanners and pipe wrenches. It grips the nut or tube, regardless of its shape, and possesses a tooth-by tooth ratchet action. Owing to the fact that it. supports the object around its periphery, it is not likely that delicate parts will be damaged. It is made by Cecil Thompson, Forsyth Road Works, Newcastle-on-Tyne. In original packing - very good used condition - see images