The pics are of Texaco Fire Chief and Sky Chief ID signs. They are made of plastic or perhaps vinyl and both have discolored over time.
The dimensions are 6 x 22 (approx) the ends are slightly curved (like to go over a door or panel) . There are two slots at the top of the each one.
If anyone knows the application or how to properly identify I would welcome the information. I have had these for over 50 years and would like to dispose of them
but need to know what they were used on and frankly what they are worth -a WAG would help

I will take a stab at this. Since traditional ad glass is flat and, well, made of glass, and these are made of plastic and three dimensional, I am wondering if there wasn't some application like the pic I have attached. Those acrylic signs were often backlit. I wonder if these signs were somehow incorporated into that type of use? This is pure speculation.

they were used on shorty gas pumps. Have a Husky one I took off a gas pump
Similar to a G&B 1016 pump from around 1960

This is why Kim makes the big money...LOL

My thanks to both alex and kim for responding i am inclined to believe they were used on gas pump panels- perhaps before pump plates were used
now looking for shorty pumps to get a better idea
i thank you both again
dann

Here is the Husky one. These were used right after the husky porcelain pump plates were phased out. The pumps were heavy beasts for their size
so I left a bunch behind in the day. I know of a few still on farms, if I ever get that way I will get you a picture.
BTW Tom , I am retired so I have NO money...

Thanks again Kim for the picture -- understand re retirement i'm there myself