It's definately compomotive.... It's embossed on....
I think that the 'magnum' was some kind of limited edition, not just the hairy bloke!
Further research has discovered that a lot of 308 owners replaced their wheels from the original metric sizes (that were difficult to get tyres for) to the easier to find, imperial..... This is a 15", and 308's were originally fitted with 14"( or the metric equivalent)....... Could this of happened here then?
It's definately 'period' though, but might be an aftermarket 'upgrade'
Sorry fir excessive use of quotation marks!