I am holding a unfired, 4 3/4" version in 45 Colt as I type this. Black plastic grips, dome blue and Turnbull case colors (frame is marked inside the hammer slot as a Turnbull gun). Never seen that before or since in all the USFA guns I have examined. US two line address barrel markings, cone firing pin, hand checkered 1st Gen hammer. Frame has a three line, three date roll mark and a firing pin bushing. The actual V rear sight is very close to original Colt 1st Gen size and not the larger Uberti V notch size. Cylinder gap on this gun is .002". Which about a third of the typically, small .006" +/- USFA, USA made specs.
Interesting gun for sure. Too bad they didn't have Turnbull do a carbona blue job on the gun.