Found this 1968 Colt Dealer Catalog that has all the prices, schematics and and pictures of all the firearms they had at the time. I didn’t know they called the Python “ Colt’s Police Python “ back then- I learn something every day. Ernie.
The "Police Python" is nothing more than a 4" barreled Python. Police agencies wanted Pythons after it was introduced and Colt was only building 6" models. Once Colt decided to start making 4" models the name "Police Python" was advertised. There's no markings to tell any difference...just a marketing ploy.