Proofhouse.com has a store brand chart that might help.
No
Savage/Stevens.
No published sn data.
1947-1950
The bolt action shotgun marked "16 GA - Ranger 105 - 20 Sears Roebuck and Company USA" was manufactured by Stevens, a subsidiary of Savage Arms. This model was sold under the Ranger brand by Sears, Roebuck and Company. These shotguns were produced primarily in the mid-20th century and are known for their simplicity and reliability.
Mossberg
The shotguns were manufactured in the 1930s. The shotguns are worth at least $200 or more, depending upon their condition.
It is the same as the Kessler 128 manufactured between 1951-1953.
Sears Roebuck co.
50-100 or so
The Sears 16 gauge bolt action Ranger 105-20 shotgun was manufactured by the Stevens Arms Company, a division of Savage Arms. Sears sold these shotguns under their Ranger brand, which was common for firearms sold through their retail outlets. The Ranger 105-20 is known for its simple design and reliability, making it a popular choice for small game hunting.
The Ranger 101.5 bolt-action shotgun was manufactured by Stevens and sold through Sears. It features a 3-round capacity and a 24-inch barrel. Given its age and unique design, it may be of interest to collectors or firearm enthusiasts.