made about 1958
1929
Colt official police with serial # 904734 was produced around 1965
Around 1943.
Manufactured in 1950
Made in 1941.
Call Colt and they will tell you.
Proofhouse.com has Colt sn data.
about 1919
If your Colt official police is chambered in .22cal?Then it was made in 1937.
your colt official police was made in 1958.
1919-1922
It was manufactured in 1920.