I have been experimenting with clip on window awnings for vintage Hehr standard awning windows, and their louvered windows too. The 1966, 1967, and 1968 Airstream frame less Awning Windows, with the 3/16" glass thickness, I am trying this prototype out on also. It will be nice to be able to offer a vintage trailer window awning option, that doesn't require screw in snaps that alter your vintage window frames, or any external hardware that requires screws being placed into your vintage trailer's exterior.
It appears that quite a variety of vintage canned hams and vintage travel trailers, besides vintage Airstream trailers, have crank out louvered windows.