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.

[Linked Image]

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.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps