FWIW, I have a 1967 Trooper. The sides of my hammer and trigger are "white"...ie not Blued like yours. Tough to tell from the photo but given your hammer, trigger and "washed out" colt, I'd say it was possibly reblued. Also, despite the colt logos on the stocks, they are not original to the revolver. Colt sold those stocks as aftermarket, much later than your 50's revolver.