1935 to 1940
The savage/steven model 65-66 was made from 1929-1945 with total production being 174,000 guns.
I am not sure about the "Buckhorn" part, but if it is the same as the Stevens (part of Savage Arms) 52B S-L-LR .22 caliber single shot bolt rifle it should date to the mid-1930s. This firearm was also sold by Montgomery Ward as a Western Field model 36. (To make things confusing, the Western Field model 36 referred to both a rebranded Stevens model 52B-62-83N and a rebranded Mossberg model 10. The Mossberg 10 was made 1933-35.) The 1934 Stevens parts catalogue includes the Stevens model 52B (see http://www.cornellpubs.com/Templates/StevensParts1934.htm), as does the 1938 Stevens parts catalogue. The Stoeger 1939 World's Fair Issue Gun and Sports Catalogue does not include the 52B, but does list the Stevens Buckhorn models 53, 56, 66, and 76. The website www.e-gunparts.com lists the component parts of the Stevens model 52B under the heading "Savage, Fox, Springfield, and Stevens." All of these were brand names used by the Stevens company.
i think 1931 to 1445
the stevens model 15 was made from 1936-1945,while the stevens model 52 was made from 1933-1937.
The Stevens model 89,22cal lever action single shot rifle was made in 1976-then discontinued.
Stevens Model 56 Made 1933 till 1945, 97,500 made. from Gun Trader.
The Savage/Stevens model 72 crackshot rifle was made from 1972-1989.
Stevens Firearms
The Stevens model 87 was made from 1938-1982,with a total production of 1,800,000 made during this time span.
A Stevens Model 416 is an identical rifle with different markings.
The Stevens model 44 ideal single shot rifle was made from 1894-1932.The model 44 1/2 Stevens single shot was made from 1903-1916.
The first model 87A was made from 1938-1945.There was also a Stevens model 87 semi-auto that was made in the early 1980,s.