So the Hiroshima bombing managed to produce some of the most horrifyingly inappropriate advertising of all time. One of the buildings heavily damaged during the bomb blast was the Teikou Bank. Inside the Teikou bank were three vaults. Two of them had their doors blown off. The third however was undamaged. During the post bombing survey done by the US Military, this vault was discovered and someone wrote to the Mosler Safe Company. The following is what they claim the text of the letter was:
…In visiting the remains of the City of Hiroshima, I found in one of the three structures still standing, four large vaults built by the Mosler Safe Co. of Hamilton, O. The vaults were entirely intact and except for the exterior being burned and rusted there was no damage. Across the room from the American-made safes were two vaults made by the Takeucho Co. located at Tokyo. These were completely destroyed, their doors blown off the hinges, and the sides crushed. To me this was a very positive demonstration of the superiority of American equipment. No other test than that of the atomic bomb could have been more severe or exacting.
I assume some copy editor punched that text up. If not fabricated a bit.
Much of this ad copy would be reused and slightly altered by many banks using Mosler's Safes. It starts dropping off during the 60's and by the 70's it disappears. The company submitted various safes and items for testing during cold war nuclear weapons tests. Most of them were undamaged but the closest ones to the blasts were destroyed to the point of no remains to be found.