Ira Sprague founded the company around 1900,, 1930 name changed to Sprague Carlton and they continued making Early American furniture till late 60`s !! Name changed again to Triumph Industries and I think they are still in business. Its not particularly rare as benches go and I am thinking yours was most likely made late 50`s or 60`!! So while not antique,, you might say its vintage as some do !! If you sell it just use "Sprague Carlton comb back bench" as for value,, if you are lucky,, $100. to $125. !! I looked at some of their prices and are about the same as any good used furniture !!