A precision telegraph-era signal printer that transmitted stock prices across financial districts.
Elias Whitmore patented his Mercantile Signal Printer in 1872, revolutionising how financial data was distributed across trading floors. The device used an intricate system of rotating drums and inked ribbons to produce legible ticker-tape output at unprecedented speeds for its era.
Brass housing, spring-wound mechanism, paper tape output, electromagnetic receiver coil, rotary print drum.