I actually won an auction on Gunbroker. I will soon have in my possession a Colt Officer’s Model Match in .38 special.
The serial number is 912XXX.
On Colt’s serial number lookup page, it comes up as a 60’s era Police Positive which it obviously is not.
On Proofhouse.com it says that from 1953 - 1971 they sometimes shared serial numbers with Colt’s Trooper model.
Trooper serial numbers in same range indicate a manufacture date of 1956-1957. Best I can tell, that all sounds legit. Can someone with more expertise confirm?