This is the Arsenal Best Armoury no.228 Steam-pistol prod. no.001 going to the US.
Although basically a copy of the original 228 twins, it's still a unique piece, that differs in many details, as you will notice if you compare it with the prototypes here: [link]
Every following model will be slightly altered as well, so every single one of them will still be one-of-a-kind.
Prod.no. is engraved on the pistol which comes with a signed and numbered certificate as proof of authenticy.
YOU want one too?
It's available here: [link]