Nations Attic 2026 Diving Into History + More

Rare Griswold Cast Iron Shallow Water Diving Helmet

The auction will start in __ days and __ hours

Start price: $2,000

Estimated price: $4,000 - $12,000

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Description

One of the most sought-after types of diving helmets among collectors are shallow water models. Often boasting unique designs, ease of use, and relatively high production numbers, they are prized for their accessibility. This exceptional helmet, however, transcends the typical shallow water helmet, boasting rarity and intrigue.The Griswold helmet, a brainchild of commercial diver, engineer, and inventor Chuck Griswold, is a testament to ingenuity. Patented and produced in limited quantities, primarily in bronze, it has long captivated collectors who know about them. Until now, only a single cast iron example was believed to exist.This remarkable specimen, unearthed in the Seattle, WA area and discreetly held for decades in a private collection, is a true helmet treasure. The cast iron body has been painted in a deep red finish which was applied to it long ago. The surface is still in great shape with only a few minor scuffs visible. Brass port guards shield the glass lenses, while the overall structure remains remarkably intact, free from cracks or breaks. Weighing in at approximately 70 pounds, it is a substantial and impressively designed helmet.Griswold helmets are legendary among collectors, rarely appearing on the market. In the past two decades, we have encountered only one other example, and this is the first cast iron specimen to surface. Whether you are an avid collector of shallow water helmets or a discerning investor seeking unique and exceptional pieces, this Griswold helmet is an extraordinary opportunity to own something only one other person has!All diving helmets in this auction will be accompanied by a certificate of authenticity from Nations Attic. The certificate will have a unique number that will match the number on a tamperproof hologram decal placed inside the helmet. This information will be kept on permanent file at Nations Attic and help ensure the provenance of the helmet and authenticity.All items will be shipped with a signature required upon delivery and full insurance either via FedEx or the USPS Priority Mail. Worldwide shipping is available; however, no ocean freight will be offered on large items. Payment via bank wire for customers outside the USA is required. A shipping quote prior to the auction can be provided by emailing your postal code.