Rare English 18K gold lever Royal presentation watch Circa 1861

Gold Royal presentation watch
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A fine and rare English 18 carat gold open faced Royal presentation watch, circa 1861-1862. Matte gilt ¾ plate movement, Ø 41 mm, fusee and chain, jewelled to the third wheel, two in screwed chatons, a lateral lever escapement, cut bimetallic compensation balance with blued steel flat balance spring, diamond endstone, index regulator. A hinged gold cuvette. White enamel dial with Roman hours, an outer minute track, large subsidiary seconds at 6 o’clock and blued steel spade hands. The polished case with a coin-edge band and an engraved coat of arms of Queen Victoria on the back, Hallmarked London 1861-1862. Dial and movement signed. Comes with an 18 carat gold chain and key, and a letters patent document of 1857 for Jules Dufau attached with the wax great seal of Queen Victoria and the original deed box embossed with the Royal arms.
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Diameter: 48 mm
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Signed: Hux & Sons Spencer Street London
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By repute, the present watch was presented by Queen Victoria to Jules Dufau who had invented a system of improvements for regulating or controlling railway and lighthouse signalling which was of vital to the safe running of the transport and maritime industries. Dufau’s impressive letters patent document No. 2225 of 1857 is included with this watch and still retains the wax impression of the great seal of Queen Victoria and the original morocco presentation box embossed with the Royal arms.