A Siebe Gorman twelve-bolt copper and brass diving helmet. at Whyte's Auctions | Whyte's - Irish Art & Collectibles
Antique 12-Bolt Diving Helmet, Used for Pearl Diving - Nautical Equipment - Office, Workshop & Farm
1904. Siebe, Gorman & Co. Ltd. 12-bolt helmet (with a cast brass badge riveted on the breastplate showing the company name)
NYD - Diving with Siebe Gorman 12 bolt standard helmet and SM 41-A at NYD 🇧🇻 ⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓ #nydsubseatrainingcentre 🇧🇻 #nyddiving #nydoslo ⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓⚓ #divingschool #commercialdivingschool ...