As this Nuffield jeep was by us at W&P this year, I can say after looking at it and talking to a guy there, that this is a genuine one, going by the Ministry of Supply plate, it was issued with a post war number in the YH range and had a specified repair in 1955. The plate bears 'Nuffield Mech' on it and also 'Exp', which is obviously Experimental. The workmanship in the mods is good, as to where it has been, I understood it was recently bought in Holland and now resides in the West Country.
I guess there will be more in CMV when it comes out.