Picked this up in a lot and had no idea what it was. Thanks to the Internet found out. It is a wrap-around combine harvester and a David Brown tractor. Apparantly quite rare!
...and presumably based on an actual idea. Never seen anything like that, but a good idea and possibly cheaper than a proper Combine Harvester. Nice model in nice conditon, very displayable.
I had one of those on my stall for quite a while (in very nice condition). It didn't shift very quickly despite lots of interest. Eventually sold it at the Shepton toyfair (unsurprisingly!)
Stephen