In 1887 Anschütz developed the Projecting Electrotachyscope, in 1891 a slightly smaller, powered version, the "Electrical Schnellseher" (i.e. quick viewer), was being manufactured by Siemens & Halske in Berlin, used in a public arcade and was displayed at the International Electrotechnical Exhibition in Frankfurt. Nearly 34,000 people paid to see it at the Berlin Exhibition Park in summer 1892 also Strand, London and at the 1893 Chicago World's Fair.