Absolutely authentic from the estate of a Santa Fe super collector who purchased, and personally removed, this set from a vintage Santa Fe Railroad car which was being scrapped many years ago.

These figures were originally housed in a circa 1940's Santa Fe El Capitan dining car.
I have enclosed a postcard photograph from a 1940's which you can clearly see a set of the three Zuni figures, and then a Thunderbird above the light fixture. (Postcard and advertising photo are not included in the auction, they are for illustrative purposes only.)
This is a set of three metal Zuni figures attached to each other and also a separate Thunderbird figure.
The grouping would have sat inside a mounting track, above the windows inside the diner, which is clearly visible in the postcard photo.
The figures are a cast metal alloy, the Thunderbird retains a glossy finish, while the Zuni figures are in a matte finish.
There are two screw holes on the bottom of the Zuni figures. The Thunderbird is one piece, un-drilled, and both would have sat along a track.
These are absolutely authentic and extremely hard to find.