The numbers on the butt are not a serial number.
On the Colt's made after 1908 the serial number is stamped on the frame just below the barrel where the crane seats. on the crane opposite the frame number, and usually inside the side plate.
Numbers on the butt on these later Colt's are someone's issue number.
Only the Colt New Army & Navy as made from 1889 to 1907 have the serial number on the bottom of the butt.
Value depends entirely on the actual condition of the finish and mechanical condition and on it being in as-made configuration and grips.
That could range from $165 in 10% original finish condition to $1,000 in 100% new.