Need the serial number to answer or go to proofhouse.com and look it up . The THP 275 stands for the city or town police department and badge number of the officer who it was assigned to.
You need to contact Colt
your colt official police was produced by colt in 1933.
Could be the issued officer's initials and badge number.
Your colt official police was made by colt in 1940.
Your colt official police was made in 1951.
That Colt official police was made in 1935,
Colt Official Police, 4 inch bbl, .38special was the issue firearm to uniformed Troopers of the NY State Police from 1962-1972. A chrome version has been refinished from the original blue.
When you release the catch to the cylinder you should see the serial number stamped on the crane at the swivel.
Your colt official police was made in 1939.
It should have the caliber marked on the barrel,such as"38 Colt New Police".
Around 1941 for Colt official police
Your colt official police was made in 1967.