Old Quality. GX1, Leitz Elmarit 90mm, Bellows II

My late father loved buying tools at sales. Today's Blip is a close-up of the maker's mark on a little carbon steel six inch rule, one of his many such acquisitions. I have other steel rules from this company which is now "Rabone & Chesterman" and their logo is three little triangles. I suspect that the divisions (Metric at the top, Imperial at the bottom) are etched as opposed to engraved.