Proofhouse.com has a store brand chart that might help.
No
Savage/Stevens.
No published sn data.
1947-1950
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
AFAIK they never made a bolt action shotgun
No age records, most likely a Mossberg shotgun, values $50-$75.
THIS Glenfield MOD 50 BOLT ACTION SHOTGUN WAS MANUFACTURED 1966-1972. I HAVE ONE AND ALSO CANNOT LOCATE THE SERIAL NUMBER.