Graphoplex

Here's a really high-quality 6" instrument from the French company Graphoplex. Fit and finish are just perfect. The scales are extremely sharp and feature run-offs and self-explanatory labels. The case is nice, thick, sewn leather. It's a great example of how good a plastic rule can be. The 4-digit phone number on the back gives some idea of its age.

Ajax Magnethermic is a company headquartered in Ohio, but with international locations, producing induction heating products. I can't find any record of their presence in Edenbridge, though.