Prokino

Background
Prokino (Japanese: プロキノ, pronounced "purokino") was the abbreviation for Japan Proletarian Film Union (Japanese: 日本プロレタリア映画同盟). It's name comes from the Esperanto translation, "Japana Prolet Kino Unio". Prokino made animations and documentary films on 9.5mm film using compact, spring-wound cameras. Their films have been displayed at many film festivals in Japan.

(1929)
Visuals: A gear, representing the labourer, with what looks like the radioactivity hazard symbol.

Technique: None.

Audio: Silent.

Availability: Seen on films made by Prokino, such as 第12回東京メーデー.