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.
50-500 usd
Colt official police with serial # 904734 was produced around 1965
1940
1929
1967
made about 1958
Manufactured in 1950
Around 1943.
Experience and Blue Book of Gun Values.