Girl with toy Pordell Projector.
1918 Exhibit, Madison Square Garden, interior, Simplex projector.
Simplex machine.
200 Central Park West. American Museum of Natural History. Interior, planetarium [Zeiss projector.]
Toy projector.
Simplex film inspecting machine.
Simplex Machine Co. Detail of Rheostat.
Simplex machine, general view.
View of Simplex automatic arc feeder.
Simplex machine, general view with rheostat attached.
The Precision Machine Co. Simplex motion picture camera.
Simplex machine with lamp house detail, interior lantern.