Yes, I don't really mind if it's not a Zullo frame, I still think it's beautiful and makes me happy every time I ride it. Though it would be nice to know what it is exactly.

I managed to google up the name of the part, it's the seat post binder, a campagnolo one, I see them on ebay but they cost something like 25$ without shipping... Is there any other replacement/alternative to this one, I don't feel like paying that much for a simple screw mechanism.