1880 Siebe & Gorman Diving Helmet
Siebe Gorman Diving Helmet 6 Bolt Admiralty Pattern
Siebe, Gorman & Co., Ltd. “Admiralty Pattern” 6 bolt helmet
Siebe Gorman Diving Helmet 12 Bolt 10597
Siebe Gorman Diving Helmet 12 Bolt 635
Siebe Gorman Diving Helmet 6 Bolt
Siebe Gorman Diving Helmet 1705
Siebe Gorman Diving Helmet 6 Bolt 13087
Siebe Gorman Diving Helmet 9967
Siebe Gorman Shallow Diving Helmet
