Novelty inkwell – £1600 at Golding Young & Mawer.

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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 at £1600.

Siebe Gorman developed diving gear and breathing equipment.