In short, no. The pressure rating of the barrel of a .38 gun will not handle .357 pressures reliably. Even if you could somehow find a cylinder that would fit, it would eventually blow up in your face.
Not recommended. Seek the help of a gunsmith
When you release the catch to the cylinder you should see the serial number stamped on the crane at the swivel.
open the cylinder. if just cleaning......run an oil rag down the bore and cylinder. If fired, clean bore and cylinders with a bore cleaning solution, dry, then apply a light coat of oil for storage....................
50-500 usd
1964 Police Positive Special & Detective Special
In 1926 for the police positive .38 and 1919 for the police positive special.
Colt 38 special police edition s/n 18759
Your colt police positive special was made in 1972.
The duration of Special Rescue Police Winspector is 1800.0 seconds.
Colt police positive special was made in 1915
S&W did not make a model called "police special",
Special Rescue Police Winspector ended on 1991-01-28.