In May 2001 from AIM Surplus, I got (6) 38 sp Colt Police positives for $60 each + $18 tax, shipping, and FFL.
They were Police surplus supposedly with no grips. I was going to use them for destructive testing.
But they arrived with grips and were too nice to blow up. All were made in 1965.
Anyway... they had the police department name welded over on the backstrap.
Can you see the weld?
The heat from welding an assembled revolver compromised some of the hammer springs [MAIN SPRING].
They could set off a primer in single action, but not double action. And could not set off a magnum primer.
This was fixed by buying new springs.
But I did find out that magnum primers are harder to set off.