I wonder could it be an old ISM model? They produced some pretty niche stuff until they folded. There was also a UK manufacturer that disappeared round about the same time. I forget the name, but I think the detail on their models was relatively limited, and the range pretty mainstream WW2 and Cold War.
Intriguing! If you ever find out whodunnit, do let us know!
Looks like a BMR to me mate. I’ve a dim recollection that maybe Skytrex might have made a BMR and a CEV when they did 1/300th. I’m emailing Andy at H&R later, I’ll ask him as they have the old Skytrex moulds.
I’m with Jim, it’d be great to know where it is from – I could do with some as Pandur’s for my Austrians.