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Sperry Date: March 20, 1928 Format: 8-Page Typed Document on Historical Onion-Skin Paper (Carbon Copy Era). HISTORICAL OVERVIEW: Original 1928 8-page technical proposal by legendary American inventor Elmer A. Sperry (founder of the Sperry Gyroscope Company). Written immediately following the tragic December 1927 sinking of the USS. Submarine, this document outlines Sperry’s visionary concept for a specialized salvage vessel. The end of the document features the typed name. (Note: This is a typed attribution from the era, not a hand-inked signature). Paper: Original, delicate onion-skin paper typical of late-1920s office duplicates. Flaws: No tears or rips. Expect light, natural age-toning/yellowing consistent with a 90+ year-old document. Text remains crisp, dark, and entirely legible. Track Page Views With.

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