The last patent date is neither 1909 nor 1914. The last patent date is 1906. The barrel is engraved: "SMITH & WESSON SPRINGFIELD MASS. U.S.A" (first line) "PAT'D AUG. 4, 96, DEC. 22, 96, OCT. 8, 01, FEB. 6, 06." (second line)
This is an early gun. The serial number is only 3xxx. I guess...