Back in the day Davis Custom produced a lot of PPC guns for the Practical Pistol Competition, and he was noted for making a very fine revolver. Your barrel is what is known as a slab sided barrel. Search for Bill Davis custom PPC revolvers and you will get plenty of info.
OK, I can't get pix on here right now, but I'm curious. Do you think serial number K499xx left Springfield in 1948 or '49? I arrived in the world in June of 1949, so it was probably already here waiting for me regardless.
I got this gun in a trade when I was collecting High Standards. The fellow who traded it to me had a set of Goodyears on it when he traded it to me, but said he thought he had the original grips at home and took my address. Sure enough, the original, numbered grips showed up about a week later. Sometimes folks come through for us!
Froggie
I had always believed that my K38 serial # K817xx was a 1950 but not sure now. I found this one with Pachmayr's on it at a LGS, no chance of finding the original grips. I have targets on it for now with hope for finding period correct diamond magnas. The info here on this site is nothing short of amazing.
I acquired a pre model 14 about two weeks ago and have since traded it for something else. It had an 8 3/8 bbl. and a target trigger and it had been refinished several years ago. I didn't feel good about the gun and I'm glad to be rid of it! There is a reason it was at the LGS for about two years. Also, according to the serial # on the frame it dated to 1949.