A Weird Inscription
The chest appeared to have some sort of strange inscription on the back, which really piqued the Redditor’s curiosity. He posted an image of the chest online with the Asian script. When translated, it was found that the script was, in fact, Japanese. A commenter who spoke the language said the words translated in English to "Damage Control Gas Aid Kit."
Another user, who saw the photos, insisted that he knew exactly where the chest came from. As a WWII reenactor, the poster was positive that it was a Japanese squad-level field medical kit from the 1930s. The kits were air and water tight, which is why the chest hadn’t aged much at all.