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Louisville, Kentucky, circa 1906. "The Post Office." 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.
My guess is that it is a gong bell housing for robbery, burglar, or fire alarms for a nearby building.
Mounted atop the curb at the left side of the intersection there is an item of street furniture. It is approximately six feet tall, and bears a resemblance to an old drug store 'your weight for a penny' scale. Does anyone in the Shorpy braintrust know what it was?

This was replaced by a new post office and customs building in 1933. The Postal Castle met its inglorious end in 1942-43.

Seems like a mammoth sized building just for sorting letters and whatnot in circa 1900 Louisville. Unless post offices of the past housed a multitude of other govt. entities?
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