Question for anyone into older S&W revolvers, I bought what I thought was a Model 28-2 Highway Patrolman 357 but upon inspection of the frame under the cylinder, it says Model 57, which would make it a 41mag . Gun also came with the original blue/silver S&W box, which is labeled with Model 28-2 and the correct serial number for the gun. Anyone ever run across this? I thought at first someone had changed a 41 to a 357, but it looks like it came from the factory like this.