Original WWI / WWII U.S. Gas Alert Trench Gong Alarm German Navy - Kreigsmarine but the left aviation insignia

but the left aviation insignia is missing the propeller

now preserved mainly under the front closure

but the flag is otherwise in excellent condition

which looks to be a large circle surrounded by 8 smaller ones

and then reissued for WWII

Original WWI / WWII U.S. Gas Alert Trench Gong Alarm German Navy - Kreigsmarine but the left aviation insigniaOriginal item: Only One Available. Gas Warfare, now banned by International Treaty, was first introduced in WWI on the Western Front, and the results were devastating. Soon everyone was issued with a gas mask and was required to carry one at all times. With all the noise in the trenches, this gong style system was adopted to alert soldiers in the trenches of an impending attack. These gongs had a totally unique sound, and were quite jarring. They were