English silver marine deck watch with warning alarm Circa 1822

Silver half-quarter repeating lever in mahogany box
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An extremely rare, large English silver precision deck watch with half-quarter repeating and warning alarm, circa 1822. The case with London hallmarks for 1822-1823. A massive case, engine-turned, gold hinges, wheel at 6 for setting the alarm hand. Hinged silver cuvette with winding apertures. White enamel dial with radial Roman numerals, outer minute track, large subsidiary seconds and blued steel hour and minute hands, gold alarm hand, blued steel seconds hand with gold centre.
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Matte gilt, three-quarter plate movement, the going barrel secured by a further plate with blued steel screws, jewelled to the third wheel with screwed chatons, lateral lever escapement, chronometer-type cut bimetallic compensation balance with wedge-shaped temperature compensation weights and meantime adjustment screws, blued steel flat balance spring with index regulator, diamond endstone, repeating on a large gong activated by depressing the pendant, further alarm train. Dial and movement signed movement and case is numbered.
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Diameter: 70 mm
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Signed: Viner & Co., Inventors & Patentees  London
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Mahogany three-tier deck box included.
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This large and unusual deck watch is particularly high quality with gold hinges to the case, chronometer type balance and diamond endstone. It is a precision watch intended for use at sea and has the unusual feature of a warning alarm. It cannot be certain exactly what this was used for although it is likely that it was to indicate the end of a watch or period of duty on the ship. Charles Edward Viner (1788-1879) was a very fine watch, clock and chronometer maker, he was apprenticed to Thomas Savage and became a member of the Clockmakers Company in 1813.