Case, Chemical agent detector kit M18
Genuine post-WWII US special device for sampling and testing ambient air for gases. Soldier had to inject the air samples inside several tubes holding a reactive solution that would reveal the exact nature of the agent.
Mint condition, empty, with its genuine carrying strap.
Standardized as the M18 in 1957, it was produced over 19 000 kit until it was obsoleted in 1965.