Bryan, Oddly it took several years to come to the conclusion that it had been nicked! I'd had a couple of occasions where I could have done a few small jobs but only half heartedly looked for it. We finally had a good reorganization of the workshop and that's when it became obvious it had gone. I have a lifetimes worth of tools and unsurprisingly every so often I find another missing! I have always looked after my tools from age 16 when no one would steal a tradesman's tools as that was how he fed his family, How times change!
Martin