Go to proofhouse.com to date it. Value depends on condition. Check the auction sites for what they are bringing. Broad range would be 100-400.
No way to answer without the serial number.
It should have the caliber marked on the barrel,such as"38 Colt New Police".
manufacured about 1915.....................
made about 1917
made about 1919
1931
50-350 usd
1927
1921
With serial # 118840, it was made in 1914. 95 years ago.
somewhere between 1908 and 1966. A serial number might narrow it down.........
made about 1913. value depends on condition