English gold watch with 52.5 minute carrousel Circa 1915

Gold precision watch by Bahne Bonniksen
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A heavy English 18 carat gold open faced precision pocket watch with a 52½ minute carrousel, circa 1915. ¾ Plate movement, a gold screw compensation balance and freely oscillating, blued balance spring. White enamel dial with Roman hours, an outer minute track, sunk subsidiary seconds at 6 o’clock and spade & whip hands. The plain case is monogrammed on the back, maker’s mark FT for Frederick Thoms. Case numbered, movement signed and numbered.
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Diameter: 53 mm
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Weight: 134 g
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Signed: B. Bonniksen 16 Norfolk St Coventry
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Carrousel timepieces are an invention of the Dane Bahne Bonniksen, who registered a patent in England in 1892. With his invention, he wanted to strike a balance between an expensive tourbillon and a normal chronometer. He even achieved better results with his carrousel watches than other manufacturers with tourbillons. One is only aware of very few copies that bear B. Bonniksen’s signature.