So if it was Gunther Insam , what do we know about him ? Anything ?
One coincidence is that Bolzano Mendola was a round of the world sports car championship in 1965 where 'VPK' was a works entry in the supporting 'sedan' race. Maybe it was sold on to a sports car competitor after the race ? BMC were known for selling competition cars after overseas races as it was usually more economical to sell them than bring them back. The '67 Sebring works Mini was also sold on after the race, U.S competitors were particularly keen to procure cars sent over to race from the UK. Steve Neal's '64 Arden racer also ended up in the U.S and is now being restored in Canada.
We're still assuming this is Bolzano Mendola 1965 but it's highly likely considering car 126 behind is a Lancia Fulvia !