I agree with John that the date of the sale and the date of delivery/possession may be significantly different -- and that adjustments could have been made. What would be interesting to know is whether the information in the hand-written records appears to be one with or without annotations, deletions (white out), corrections or adjustments, etc/ -- but I believe Alfa policy does not permit Marco Fazio to talk about any such appearances. I believe he is only allowed to convey what the last and therefore official record says.
If we wanted to speculate about how a transaction may have happened, I think it's quite unlikely that a car delivered to Switzerland would be reassigned do another buyer. This would be easily possible for cars delivered on consignment to an agency in Italy (remaining the property of Alfa Romeo until sold) but not for a dealer that outright bought and certainly not for trans-border transactions. In my mind, the most likely scenario is that the car was sold to a US buyer who picked it up at a contractually agreed-upon location in Europe (Switzerland in this case) and that the Customs documents were prepared accordingly (temporary import and re-exportation in less than a year from the date of import, etc.).
[SIZE="1"]'63 2600 Touring Spider (AR 191437, the car that started the 2000/2600 International Register, reassembly in progress)
ex-'65 2600 SZ (AR 856043, the car in my avatar, sold as resto project to Austria)
Maintainer of a private 2600 SZ register (not the one in the Netherlands).[/SIZE]