Burdick classified Sun Photos in his ACC with W626. They have been known a about a long time.
I picked these up recently and haven't been able to find this Ruth pose, either in the series, or in other series, similar to other cards from the series with a pose from another set. I am probably just missing it though.

This color negative and others in the series, set against the red background of the card negative holder, is probably the reason why we see the developed cards be a yellow - orange color with multiple borders (from exposure I guess)....Any help is appreciated. Happy collecting...(Large scans on purpose)