There is not way to answer since you did not provid the serail number. You can call Colt with the serial number and they will tell you. Alternatively, The Blue Book of Gun Values has sn data in it.
Colt official police with serial # 904734 was produced around 1965
If your Colt official police is chambered in .22cal?Then it was made in 1937.
your colt official police was made in 1958.
Made in 1929.
Call Colt and they will tell you.
1940
1929
Proofhouse.com has Colt sn data.
1967
made about 1958
Manufactured in 1950
Around 1943.