From what it looks like, the Cinquatenario decal is definitely giving a hint that it's from 1961 slightly later. Judging from the components on the bike that seems period appropriate, it's a good estimate for its age.
The gruppo on it looks to be Camapgnolo Gran Sport, which was the main top line offering from Campy at that time.
Being a 50th anniversary bike from Bottechia, I suspect that it has higher value than other Bottechias from that era, especially for Bottechia collectors/fans....
The finish on the bike is quite "challenged", especially if some of what we see in the pics is rust. That could affect the value of the bike a bit if some if most of that cannot be easily repaired or cleaned off.