The gun is a New Model Flattop Blackhawk 44 Special. It comes with a steel grip frame that's of the XR3 size. I've converted it to the XR3-RED frame by fitting a new stainless steel grip frame to the gun.
The original gun has a stainless steel trigger and hammer. The trigger is original, but the hammer has been replaced with a standard blued BlackHawk hammer. I did this because the ears on the replacement grip frame were smaller than the originals and the round portion of the hammer protruded too much to suit me, plus I happened to have a standard BlackHawk hammer. The hammer is an older one.
There was some changes to shape of the ears on Blackhawks in the 90s best I recall, with larger ears becoming the norm. The grip frame I bought was a brand new one from Midway.