Four (4) piece US Navy dive helmet and dive suit consisting of Morse Diving Equipment Co. Mark V copper and brass diving helmet with air hose, diver's canvas suit, leather weight belt with 10 lead weights and pair weighted shoes. Plaque on helmet marked "US Navy Diving Helmet/Mark V/ A.J. Morse & Sons Inc./Boston, MASS/No. 2749/Date REC 39" with matching numbers 2749 on collar and brails stamped "front" and "back". 80" H x 55" W arm spread x 14" D plus 47" L hose. Cloth shoes/Lead and brass boots: 9-1/2" H x 5-1/2" W 14-1/2" L (all measurements are approximate). American, 1939. Provenance: Private Florida collection. Please note: spanner wrench for this Mark V helmet is being sold in Lot 786 in this sale. CONDITION: Overall good condition. Helmet with few dents. Suit with few patches and some staining. Suit stuffed with newspaper. Leather strap on one boot damaged.