Peter, that is an interesting link. We had identified the camera as from Philco, from 1936 magazine articles. An article written by a 1936 Philco employee mentions that they had to make their own iconoscope since RCA wasn't selling them at the time.
Here is a page with all the photos and the article.
www.earlytelevision.org/rca_1936_camera.html
Notice that there appear to be two similar but different cameras, and two styles of iconoscopes.
Can anyone shed any light on this? Did Philco copy the RCA camera?