Precinct 19
Charley, a Precinct 19 police officer
Charley's partner
Precinct 19 was a police department district, located in New York City during the 20th century.
In 1968, Charley and his partner, working out of that precinct, responded to a telephone emergency call from 811 East 68th Street, Apartment 12-B. (TOS: "Assignment: Earth")
The numbers on the right and left collar of the police officers identified the precinct they were assigned to.