Time and again this subject provokes not a little debate so I thought I would offer up scanned copies of the Fiat colour chart for the car. It is dated 7/79.
Now it is quite comprehensive and it includes the colour combinations of all of the versions that I have personally seen either in person or in the net,....EXCEPT those elusive orange and green bumpered versions.
As discussed on another thread one theory is that these were for the Asian market and I've seen a green bumpered grey car racing in Australia.
I've also come across the attached advert showing an orange bumpered car - Grey body again.
If the colour chart is to be believed orange and green bumpers were not made, this is contradicted by the Fiat 131 Sport brochure and most recently Albert's list of part numbers for the 6 bumper colours (Black, Grey, Blue, Beige, Orange & Green).
Note the explanatory diagram on the first page indicating which parts of the car the colour relates to. Something that I'm not sure is widely known (although I think Albert made reference to this) is that the seatbelts and front seat covers (if fitted) and bumpers were all the same colour - Which is another small point of unoriginality on my car to be resolved - Black bumpers and silver/grey seat belts!?
So where does this leave the debate? Gloriously unresolved which means we can continue arguing over it indefinitely !!!?