VERY nice pistol...frame may be industrial hard chrome as that was a popular finish back then. I have a pistol with an industrial hard chrome finish, and that is one of the toughest finishes on the planet...even though my pistol is over 30 years old and has been used in countless pistol, and 3-gun matches in desert and Pacific Northwest wet weather and mud, the pistol looks like the finish was completed last week.
Cerekote is a tremendous finish, and wears like nobody's business, but I think my hard chromed pistol shows less wear over time.