Koehler Optical Co.
Projectors; Motion picture equipment
Advertisement: On page 752 of The Moving Picture World, November 3, 1917. “Our New Portable Home Projector Now Ready,” Koehler Optical Co. Manufacturers, 7 East 14th Street, New York City. Description and illustration; price.
Printed BW advertisement; 6” x 7.5”
Jonathan Silent Film Collection