ajbpsu: You have a .38 Safety Hammerless 4th Model, dating from between 1898 & 1907. Serial number range was 116003 to roughly 220000.
According to the Standard Catalog of S&W this gun in excellent to excellent+ condition was worth $400-$500 in 2006. I suggest you look on www.gunbroker.com
to get a feel for current pricing.