I finally did a proper time test (or in this case an f-stop test) for the Kodak Autographic;

I was testing the Fuji Velvia 50. Because it is a slow film I decided to try my Velvia 50 as the color film for my pre-1940 cameras, Here are the results. The f-stop range is 4, 8, 16, 32. I took two scenes. Scene 1 is a partially shaded path in a local park: Coal Creek Park.

The f/4.0 (first image) and the f/8.0 (second image) are both acceptable. The f/32 is definitely too dark, Results are similar for the stream shot from the same park.

So for the Kodak Autographic No.1 using the Fuji Velvia 50 film, either f/4.0 or f/8.0 depending on the lighting conditions. In very bright light one might consider try f/16.