U.S. Navy Morse Dive Helmet, copper and brass, manufactured by the Morse Diving Equipment Company, serial number 4301. Plaque to front of helmet reads "US Navy Diving Helmet/Mark V/ Morse Diving Equipment Co. Inc. /Boston, Mass/No. 668/Date 4/6/42". Collar marked "DROP 311 USN 018528". Inside of helmet marked MORSE BOSTON and MADE IN U.S. 4. The brails and bonnet all marked with the serial #4301. 18 1/2" H x 16 1/2" W. Provenance: Owned by the consignor's ancestor, Francis J (Johnny) Fernandez, born on January 1, 1909 in Taunton, MA. He enlisted in the Navy when he was 31 years old. He died in 1966 in Taunton, MA. CONDITION: Overall use wear with some scattered light denting. Oxidation to metals including green oxidation to brass along with some white patination. Some areas of uneven patina noted to the back of the helmet.