I'm kinda new to the revolver scene but I've picked up two Colts and am being given a third. My cousin is sending me a Colt 1889 he found at a flee market than is not operational. Hammer won't cock, trigger will not return and it's missing a screw on the exterior someplace.. Now I understand it will likely be a large project that may never result in me putting a round down range but I really want to try to get it to work. My main question is are the New Navy parts at all interchangeable with the older 1889? The main difference between the two is the addition of the bolt correct? I apologize if it is a dumb question but as I haven't been able to find a diagram of the 1889 I'm at a complete loss :/. He's returning from his trip Wednesday and will be sending me some photos before sending the gun I'll post what he sends.