Vintage Marine Diving Divers Helmet US Navy deep sea Scuba Boston Mark V Helmet. Premium quality well made deep sea divers helmet replica. Metal: Solid Steel Iron, brass Finish: Polish Finish as shown in Picture Approx Size: 16" x 12.5" x 17 / 40 x 32 x 42cm. Model: Boston Mark V -Usage : Home Decorative, Desktop Decorative. Table Decorative Collectible Items -Packing: Packing In One Parcel.