This Marine Nautical Diving Helmet is an antique reproduction of the US Navy Mark V design, crafted from a combination of aluminum, brass, iron, and bone materials. Made in India during the time period of World War II, this 18-inch helmet bears the authenticity of the era and the craftsmanship of A. Perfect for scuba diving enthusiasts or collectors of maritime artifacts, this diving helmet exudes a touch of history and style reminiscent of the Boston diving helmet. Bring home a touch of maritime history with this vintage-style diving helmet, a perfect blend of artistry and old-world charm. Made from high-quality Steel and aluminum, this beautiful piece replicates the classic deep-sea diving helmets used in the early 20th century. Size : 18 Full Size. Top head measurements: 16″ x 12.5″ x 18 / 40cm x 32cm x 45cm. Weight : 6.5 kg Approx. Volume Weight : 12 Kg. Color: As Shown in Picture. Material: Steel & Aluminium & Glass.