Keys and locks p200e

I’m finally getting around to the fiddly things on my scooters. I’m up to locks and keys. I have no keys for my scooters, that’s how they were when I purchased them. I’ve checked the VINs with the local motor authority and they weren’t stolen. I spoke to a locksmith this morning about cutting some keys and he hit me with a couple of questions which I couldn’t answer.
Firstly is the Vespa keyed to a single key?

Secondly he said he can cut virtually any key if he has a serial no for the lock. Where would this be on a Vespa?

I really don’t want to buy two complete sets of locks and keys if I can avoid it.

Thanks in advance