Original U.S. WWII OSS Anti-Disturbance Black Box Mine NOS with Testing Bulb & Mounting Hardware in Original Wrapping Paper - Outstanding U.S. Marines USMC Size is faintly stamped as

Size is faintly stamped as 57 at the crown of the interior

History of these maps:

but is still lovely

but we assume they were to be used for drill purposes or something similar

Dutch and Yorkers from eastern New York

Original U.S. WWII OSS Anti-Disturbance Black Box Mine NOS with Testing Bulb & Mounting Hardware in Original Wrapping Paper - Outstanding U.S. Marines USMC Size is faintly stamped asOriginal Item. One of a Kind. This is an extremely scarce piece of technology developed for use by the OSS during World War II, the Anti Disturbance or Black Box mine. The OSS (Office of Strategic Services) was formed by the US Government during World War II, as an intelligence agency that was tasked with performing and coordinating espionage activities behind enemy lines. The agency was the predecessor of todays Central Intelligence Agency (CIA). The