They are very collectable. This example, made in nickel plate and mounted onto a black-painted mahogany plinth, 5in (13cm) high, was offered at Golding Young & Mawer (20% buyer’s premium) in Lincoln on March 18.
It was estimated at £100-150 but sold to a bidder via thesaleroom.com at £1600.
Siebe Gorman developed diving gear and breathing equipment.