Harry Charles was correct. At the start of Sound Motion Pictures,
the sound was recorded on a 16 inch Disc at 33 1/3 RPM and was in sync with
the 35 mm Film.This photo is a Sound On Disc Projector using 16 MM Film.
The Projector was made by the Victor Company in the early 1930's.
Sound on Disc Motion Pictures had sync problems and soon after, it was a sound
Track on Film. Tony Cucurullo was right about my age, I am 89 Yrs old.
P.S. An early Sound On Disc Picture with only a few minutes of sound was "The
Jazz Singer", with AL JOLSON in the late 1920's.
Tony. You are in our Prayers Get Well...