Hi,
I tried to email you direct but it bounced back undelivered, so here is what I know.
The only info I have is that 383101 was with Frederic L Aibel NJ USA then went to Griggs USA.
The car apparently also used the ID-plate from 401141 for a while.
This Info is sourced from John deBoers who has a register for all rare italian cars.
You can ask him for more info at his email iicar@earthlink.net
Hope this is of some assistance to you.
Cheers
Nick