![1904. Siebe, Gorman & Co. Ltd. 12-bolt helmet (with a cast brass badge riveted on the breastplate showing the company name) 1904. Siebe, Gorman & Co. Ltd. 12-bolt helmet (with a cast brass badge riveted on the breastplate showing the company name)](https://www.divinghelmet.nl/images/1839-augustus-siebe-2/SG12Ltd1stGJ_000%20web%201.jpg)
1904. Siebe, Gorman & Co. Ltd. 12-bolt helmet (with a cast brass badge riveted on the breastplate showing the company name)
![A Siebe Gorman twelve-bolt copper and brass diving helmet. at Whyte's Auctions | Whyte's - Irish Art & Collectibles A Siebe Gorman twelve-bolt copper and brass diving helmet. at Whyte's Auctions | Whyte's - Irish Art & Collectibles](http://www.whytes.ie/images/archive/20160917/180_1.jpg)
A Siebe Gorman twelve-bolt copper and brass diving helmet. at Whyte's Auctions | Whyte's - Irish Art & Collectibles
![Nautical Marine Siebe Gorman & Co Submarine Engineers Diving Helmet | Art, Antiques & Collectibles Collectibles Transportation Collectibles Marine & Nautical Collectibles | Online Auctions | Proxibid Nautical Marine Siebe Gorman & Co Submarine Engineers Diving Helmet | Art, Antiques & Collectibles Collectibles Transportation Collectibles Marine & Nautical Collectibles | Online Auctions | Proxibid](https://images.proxibid.com/AuctionImages/2415/166051/FullSize/142.jpg)
Nautical Marine Siebe Gorman & Co Submarine Engineers Diving Helmet | Art, Antiques & Collectibles Collectibles Transportation Collectibles Marine & Nautical Collectibles | Online Auctions | Proxibid
![1904. Siebe, Gorman & Co. Ltd. 12-bolt helmet (with a cast brass badge riveted on the breastplate showing the company name) 1904. Siebe, Gorman & Co. Ltd. 12-bolt helmet (with a cast brass badge riveted on the breastplate showing the company name)](https://www.divinghelmet.nl/images/1839-augustus-siebe-2/SG18601_007%20web.jpg)