Colt Acetylene Flash Lantern

The Colt Acetylene Flash Lantern (or Colt Field Signal Lamp) was an acetylene signal lamp produced by the J. B. Colt Company and used by the United States military at the start of the 1900s. A patent for the device was filed in 1902.

Source: Wikipedia — Colt Acetylene Flash Lantern (CC BY-SA 4.0)