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YMCA

Okay, so we’re missing a few people to act out other letters, but it’s a good start! The caption refers to both old and new technology, and the “old” part is the wig-wag signaling motions, and the “new” part is the battery.

1900 – Signal Corps Equipment Old and New. Pictured above is a Signal Corpsman, circa 1900, using a visual battery-operated signalling device. U.S. Army Photo.

Image #4132

For bibliography purposes, these images can be cited:

Image #—, “US Army Photo collection, C-E Museum Acquisition” from the CECOM Historical Office archive, Aberdeen Proving Ground, MD.

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