Top lever, trigger guard tang & screws, safety button, floor plate, wouldve been blacked. Modern high quality hot blue is whats used now.
Case colored parts are trigger plate, frame (obviously), forend iron. Forend fastener. Pins & Screws
Polished parts, were usually triggers and internal bits.
Refinished Guns usually sport fire blued pins & screws, sometimes the trigger blades are fire blued or blacked. Sometimes floor plates were blacked after theyve been polished and even trigger plates have been blacked. Different strokes for different folks...some shops had a style all their own.
