Colt Single Action Question

neatguns

After 30 years dealing collectible firearms I just picked up my 2nd Colt Single Action. 357 Magnum, 5 1/2" barrel, stag grip. SN: 309300. Dates to 1910. Frame, grip, trigger guard are matching. The barrel is marked "357" in small numbers on the left side. No other markings. This has 2nd generation firing pin and hammer. They started 2nd generation after WW2. my main question is was it common to modify 1st generation frame to use 2nd gen firing pin? I know there several gunsmiths in the 1950's-1970's that rebuilt SAA in the USA. There was one here in Indiana but I can't remember the name. This is a nice looking gun. Vivid case colors. No wear. I Never held stag grips before. Almost too wide. The grip looks exactly like Colt grips in collector books.

mac10

Seems to be a Frankenstein 🧑‍🔧

Butchdog2

Something is way off with your description. What Mac 10 says.

dunbarboyz

357 magnum wasn't developed until 1934.

truthful

The .357 Magnum was developed in the early 1930s by Elmer Keith, and others, and introduced in 1935. I would be a bit cautious about a 1910 era SAA firing it regardless of how it was converted.