Vintage Yokohama Sensuigu Diving Helmet – Circa 1955

Vintage Yokohama Sensuigu Diving Helmet – Circa 1955
Original Copper & Brass Helmet | 12-Bolt, 3-Light | Authentic Maritime Collectible

We are proud to offer this authentic Yokohama Sensuigu Diving Helmet, manufactured by the Yokohama Diving Apparatus Co. Ltd. around 1955 in Yokohama, Japan. This rare and highly collectible helmet is a classic example of mid-20th-century Japanese diving technology, featuring a 12-bolt, 3-light configuration and constructed from solid copper and brass.

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Detailed Description

This helmet is a striking example of functional maritime engineering and historical craftsmanship. It features:

• A large central viewing port with two side lights, providing full visibility for the diver

• A classic 12-bolt locking system for secure attachment to a suit

• Original air inlet and exhaust valves, reflective of Yokohama’s robust designs of the era

• An untouched, naturally aged patina with rich green and amber tones, offering authenticity and visual appeal

Unlike many restored or replica helmets, this piece remains in original, unrestored condition, making it ideal for serious collectors who value authenticity over polish.

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Provenance & History

This diving helmet was sourced directly from Fukushima Prefecture, on the main island of Honshu, Japan—a region known for its deep-sea fishing and industrial diving heritage. The Yokohama Diving Apparatus Co. Ltd., based in the port city of Yokohama, was a leading producer of commercial and military diving gear in post-war Japan.

Helmets of this kind were used in a variety of underwater operations, from harbor maintenance to salvage work, and today, they represent an important era in global diving history.

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Who Is This For?

This helmet is perfect for:

• Collectors of vintage diving equipment

• Interior designers and decorators seeking authentic nautical statement pieces

• Maritime museums or heritage centers

• Film and television production needing historically accurate props

• Anyone looking for a rare, Japanese diving helmet for sale

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Authenticity & Shipping

This is a genuine vintage piece, not a reproduction. It has not been modified or restored, and it retains all of its original fittings and finishes.

We offer secure international shipping and take great care in packaging large, valuable artifacts like this diving helmet. Buyers are welcome to inspect it in person at our Northern Rivers store by appointment.

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Don’t Miss This Rare Find

Vintage Japanese diving helmets—especially original pieces from the Yokohama Diving Apparatus Co.—are becoming increasingly difficult to source, particularly in untouched condition with full provenance.

Whether you’re a seasoned collector or looking to make a distinctive addition to your maritime collection, the 1955 Yokohama Sensuigu Diving Helmet represents a unique and valuable opportunity.