Lot of 3. 1) Submarine Signal Company. Issued in 1944, stamp cancelled. Green border and background and steamship vignette. This company developed, patented and began manufacturing electromechanical bell signals and shipboard receivers based on previous research introducing the world's first electronic, underwater acoustic navigation aid in 1901. During World War I and after the Submarine Signal Company had expanded into fathometers and other marine electronics including radio direction finders and radiotelephones as the acoustic aids faded in importance with radio navigation gaining importance and users. In 1946 the company was acquired by and merged with the American Appliance Company, later Raytheon, to become that company's Marine Division responsible for all products with marine applications. 2) Old Colony Steamboat Company. Two stocks, issued in 1884 and 1891. Both stamp and pen cancelled. Nice steamboat vignette. Date: 1884-1944Country (if not USA): State: City: Provenance: Bill McKivor Collection