Top is actually a USFA 44 Special. The bottom gun is a 2nd Generation 1967 gun with work by Hamilton Bowen. It's a 45 Colt, and Colt cylinders came out of the factory with cylinders more and more oversized because of their worn out reamers. The cylinder in this one is a reamed out 357 cylinder. It is pretty, but it's also one of the best shooters I have had.