As I wrote, a Sport bike has a straight-gauge tubing frame, upright bars, pump pegs, internal cable routing, mostly a single ring up front and a 3-5 speed in the rear. In other words, your bike.

It is not a road bike, it is not a city bike. Consider it an Italian hybrid from 1935-1965. I'd put yours in the middle, 1950-ish.

Yes, bici classiche is Paulo's site. I'd bet you could find a bike their that matches the details of your bike if you want to put in the time.

This was my Bianchi Sport bike.

Bianchi Sport 099 by iabisdb, on Flickr


This was my Frejus Sport bike. The original owner changed the upright bars to drop bars.

1948 Frejus 004 by iabisdb, on Flickr