Looking for some info on the above described handgun. Verified DOM was 1964, it has a long frame,round butt and a shrouded barrel. I have been unable to get a definite answer from Colt if this was a factory made gun or somebody's gun smithing work. Gun is in excellent shape and I have not seen another one like it. There are a bunch of them with the exposed ejector rods but none I have been able to find like this one...All info appreciated.