Yep, I know about VIN being the legal one and it is easy to find. I even had to make a VIN once for a vehicle I built.
The only number I have not found is the ASH Frame number; where is that located? That probably tells more about the number of 3 Wheelers and where mine is in the scheme of things.
Somehow in the excitement of getting the new machine I lost the Build Number in an email dump. I have the Build Date, but as I found out that is a dream number that has nothing to do with when the car leaves the factory.