Need the caliber to answer.
Colt official police with that serial number was made in 1937.
A Colt official police with that serial number was made in 1929.
Your colt official police was made in 1951.
That Colt official police was made in 1935,
Manufactured in 1930.
A Colt official police special with that serial number ws made in 1947.
1935
A Colt official police with that serial number was made in 1966.
That serial number would put it as an Official Police made in 1968
about 1931
1937
About 1929.