This billy club was used by police officers in the Bay Area during the 1930s.
In 1934, workers from many unions called a General Strike in San Francisco. Led by Harry Bridges, head of the International Longshore and Warehouse Union, they argued that laborers should organize together to demand better working conditions and wages. On July 5, 1934, later known as "Bloody Thursday," San Francisco police attacked striking longshore workers and killed two men. A "general strike" of all unions in San Francisco and the greater Bay Area was called shortly after the funerals of the two men.