Without pics it's just a guess, but
* the Stevens A&T Co shotgun is more likely a model 335, manufactured from 1912 to 1930-ish.
* Remington Model 10 was made in 12 ga only from 1908-1929. These are notoriously bad because of jamming once they get a little wear in the action.
* Remington Model 11 was made from 1903 to 1947. It is a version of the John Browning 1901 Automatic Shotgun (most famous as the Browning Auto 5). Good guns if they are in good condition.
All vintage stuff!