At last, my search is over. I have in my possesion a machete, about 22" total length. My father found it in the woods in the early 70's when working at a powerplant in northern Sweden. It has since then been lying under the sink in the kitchen, until I decided to finish it up. I polished away the rust and replaced the handle. In an almost illegible text you can distinguish the text: "Martindale Birmingham England No 23W", and a "frog-like" picture.
Well, now I know some of its origin. The question now is exactly how old it is.
Thank you for the link and the info.
Tea drinker and hellraiser from Northern Sweden, above the arctic circle.