In 1938 the 7.35 Carcano round was introduced, but most were either exported or later refitted back to the 6.5 round, so a Model 91 38 will use one or the other of the 6.5x52 Carcano or 7.35 x 51 Carcano. The barrel should be marked 6.5 or 7.35, but if not, have the barrel slugged.
Commonly called the Carcano, this was a bolt action military rifle that fired a 6.5mm bullet. It was the standard rifle of the Italian military for many years. It was also the type of rifle reportedly used to kill President John Kennedy.
The Mannlicher-Carcano has a six round internal magazine.
A 6.5 x 52 mm Italian Carcano M91/38 bolt-action rifle.
While conspiracy fans still argue, the official report said that JFK was killed with a 6.5 mm Carcano, a surplus Italian military rifle.
6.5 mm Mannlicher-Carcano Italian made rifle
the rifle, a mannlicher-carcano rifle, is in the US national archives.
how much is the carcano rifle worth
Depends on condition. These generally sell for around $150.
Your rifle is an Italian military rifle known as a Carcano. It was manufactured by Fabricca Armi Terni, the Italian military arsenal, in 1942. There are several versions, yours is probably the "fucile" or long rifle version. It should be chambered to fire the 6.5x52 mm (or "6.5 Carcano" or "6.5 Italian") round, but some fired the 7.35mm Italian round, or the 7.9 mm (8mm) German Mauser round. You can find more information at: http://personal.stevens.edu/~gliberat/carcano/
If we accept the official story, he was killed with a 6.5 Carcano. Conspiracy theorists often site the weapon as unable to make the shot, but it is well within the capability of the rifle.
Depending on condition and originality (no modifications) and assuming the rifle is a 6.5mm Carcano, about $150.
Yes, it did have a scope. He fired 3 shots in 5.6 seconds.