To build on my previous post, because I don't want to seem mysterious:
If there is a missing x to represent the last digit of the reported serial number, then this could easily be a correct Model 19 from about 1960-61. If you swing out the cylinder, you would see MOD 19 stamped on the frame where you can't see it when the yoke is closed.
In Todd's other photos that I didn't put up because the gun is in a holster that conceals almost everything but the grip, you can't tell if the revolver has a top sideplate screw or not. If this is a 1948 gun, that screw would be there. If it is from 1961 or thereabouts, it would not.
The grips are Mexican, by the way: eagle/snake motif and Mayan calendar give it away. The best such grips are handmade silver efforts, but others are mass produced.