No way to answer without the serial number.
No. You did not provide 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 in 1951
made about 1919
Without the serial number and a very good description to include caliber, bbl length, all markings and any accessories, the question can't be answered.
1931
1927
50-350 usd
A Colt official police caliber.22 with the serial number 1478 was made in the first year of production ,1930.
1921