A 12283
Stevens model 82 by the J Stevens arms co. made between 1935-1939.
They were produced from 1940-1945.
The manufacture date was march of 1923.
Contact Colt Customer Service for a date of manufacture- no published data.
Proofhouse.com to date it. Auction sites for value.
That's a patent date, not a manufacture date. The Standard Catalog gives a range of values from $125 in Poor condition to $275 in Excellent condition.
Manufacture date 1954
Your Stevens model 240 was made from 1940-1945.
It's not rifled because it is a shotgun. It is most likely a Stevens product made c. 1920-1950.
You will have to provide the sn and a detailed description.
Not listed.