I am thinking that this is not a original 930 cuz of the "M491" option - 930s are standard wide body. If someone asks for the VIN my bet it will be a 911 VIN code. Interesting enough, I saw a similar car offered for sale a while back ....
the story was that the original owner bought the WideBody Cab and then later wanted more power so they paid a porsche dealership to put a turbo motor in it (and the seller therefore called it a 'factory' 930). The car had no boost gauge and a 911 VIN.
89 930 Cabrio , (soon to be for sale.)