Expo

Starting production in 1905, the Expo was an American version of the European Ticka. The film was sold in a pair of cassettes that produced 20 pictures. It was sold under a variety of names in various countries, and evolved over time with changes to the engravings, viewfinders, shutters, etc. Some were even available in several colors in addition to chrome -- such as black, blue and green. It was still being sold until about 1940.