Top is a former carving knife by 'Sabatier Trumpet..France..Fully Forged Stainless'. I got this from an Op-Shop for 50 cents as the tip was bent and chipped, I didn't care

Middle: My favourite 'Scian dubh' that I made about 1983 at Cocatoo Island Dockyard from a damaged gauge; the blade is marked 'L P & A' which stands for Low Pressure and Astern. It was for checking a destroyer turbine blade; top piece of steel

Bottom: Another French knife, a folder by Opinel, this style is, I believe, a traditional design and has been around for about 150 years. I bought this new a few years ago and it's my every day 'user'. The blade locks positively in the open or closed positions by a rotating collar, a very safe knife, 10 cm blade.