A 12 bolt Siebe Gorman diving helmet,  by Siebe Gorman & Co. London, circa 1918.

Three light, side lights with protective grills.

Marked: SIEBE GORMAN & Co Ltd LONDON

Serial numbers: Bonnet  6899 (Corselet: 9970).

Siebe Gorman & Co, Submarine and General Engineers, Neptune Works, Davis Road, Chessington, and 187 Westminster Bridge Road, London.

Founded by Augustus Siebe in 1819/20, as Siebe & Co.

Exhibited at the 1851 Great Exhibition.

In 1870 William Augustus Gorman became a partner, and the company was renamed as Siebe and Gorman.

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