I wonder, seeing that a Tipo Alleggerito sells for a bit more than a standard Model 35, perhaps someone had access to a machine shop, and with no serial number how could you prove it was not authentic? Also; something to think about, all Berettas that I have seen had a serial number, unless you can prove it is a prototype ( which I doubt ),well, there are those who would take a dim view of a gun with serial number removed. Just wondering.