well after wanting one for a while I have a new long term project via my pal Jon Hickman, its a nice early M5 1/2 track. I haven't done all the research h yet but assuming British (or Commonwealth use) and then shipped to Argentina where it looks like it was converted to a mortar carrier and had a Fiat/Iveco diesel fitted. Otherwise its pretty much complete and comes with most of the missing bits such as winch, lights, brackets etc
I am going to restore as a British (or maybe Polish vehicle) and keep the diesel engine for now. All rather excited if I am honest