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About this collection

The Panama-Pacific International Exposition was a world's fair that took place between February 20, 1915 and December 4, 1915 in the Marina District of San Francisco, CA. The National Bureau of Standards (NBS) and the Smithsonian Institution created extensive exhibits for the exposition. Included in the exhibits were replica weights and measures of various sizes, and a miniature standard test railway car. collection’s photographs document the interior of the exhibit hall with NBS displays and exhibits.

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