Picked up a 25-2 from a buddy...he took it in a trade and didn't really need it. It has some confusing characteristics based on the little amount of research I've done. Numbered N3388XX, 6" barrel with ramp front sight, orange insert, .45 Colt CTG on right side. No 1950, no 1955, no target front sight. Any info appreciated. My guess is a non-original barrel and a .45 Colt cylinder? All of my other Smiths are Model 10s...I'm new to the 25.