Hey After riding my 1940's Rudge to commute for the last year. I decided to get myself something a bit faster

So I just bought myself a Bianchi Sprint
Some photos
here
The only writing on the bike says Calibrati 1-20 on the frame, Simplex S001 on the rear derailleur, Ofmega on crankset and Ambrosio Extra 19 700c wheels.
I've found a number on the head tube which I'm guessing is the serial.
It reads 757049. Any ideas as to the age?
A rough price would also be welcome.
Thanks