Yet, undaunted, The Aladdin Cine Products Co. ('from the Pictures Development Co., Toledo, Ohio, USA') produced a similar experimental series of discs of local subjects, but fared a fate even worse than Spirograph.
All these curious attempts make a fine hunting field for the collector nowadays. A Kammatograph was auctioned by Christies for £ 3850 in 1993 and may be worth more now.
Other formats
Duplex half frame film
Special Duplex projector lenses were to be made available to project the 10 x 19mm half frame onto the screen.
I have a brochure but have been unable to find any reference that the system was seriously considered, or the Duplex lenses ever made available.
42mm sound film 1922
Another proposal came in 1922 for a 42 mm size to accomodate a 7mm optical sound track to existing 35mm film by the German Triergon company.
Neuf-cinq (nine-five)
After thirty years of experimentation with different widths in 1922 one was marketed which stood a better chance. In December 1922 Pathé introduced its home cinema, Le Cinéma chez soi, called the Pathé Baby.
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