Front row, left to right: Dick Hall, Edwin Rehberg, unknown, Larry Silverman. Back row, left to right: Otto Feuer, Morey Zukor, Reuben Timmins, Ralph Somerville, George Weiss, Jack Ozark, and Ben Shenkman.
This photo was taken at the side of Filmation's Sherman Way and Lindley Avenue main studio in Reseda. The building stands today, housing medical offices. All the artists, to my knowledge, worked at one time at for the Fleischer or Famous Studios. (some both)
Thanks to Tim Walker and Tom Minton for help with the IDs.