Kodaguide from the 1950s
Here is a copy of a Kodaguide that dates back to the 1950s.
Back then, cameras did not have automatic exposure abilities.
The advanced cameras did have manual controls so that you could select the shutter speed and aperture (f/stops).
This guide sold for 25 cents and also included a dial guide for Indoor Pictures using Photoflood lamps.
You could get exposure meters but the cost was almost equal to the cost of the camera. So most people used simple dial guides like this one.
The settings shown are valid even today, depending upon the film used.
Verichrome film was black & white.
Kodachrome and Kodacolor were color films.
Kodak made about 10 of these handy Kodaguides for various types of photography.