Beautifull certificate from the L.A. Submarine Boat Company issued in 1912. This historic document has an ornate border around it with a vignette of an eagle perched atop a dome.. This item has the hand signatures of the Company's President, and Secretary, and is over 98 years old.
Los Angeles Submarine Boat Company of Long Beach, California, bid on building submarines for the U.S. Navy. The construction of the submarines was to have incorporated a propulsion system that would run diesels underwater on air stowed under pressure. The Navy was interested enough in the engine to appoint several boards to examine the company's claims.