Russian brass deck watch with spring detent escapement Circa 1890

Gold deck watch in a mahogany box
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A Russian brass 30 hour keyless deck chronometer with spring detent escapement, free sprung balance and power reserve indication, circa 1890. Comes with a mahogany deck box, brass twist and lock bezel with a reeded edge. White enamel dial with bold radial Roman numerals, outer minute track, subsidiary seconds and power reserve dials and blued steel spade hands. A frosted gilt movement, jewels in screwed chatons, fusee and chain with maintaining power, Earnshaw type spring footed detent escapement, cut bi metallic compensation balance with gold temperature and meantime adjustment screws, free sprung blued steel helical balance spring with inner and outer terminal curves.
Dial and movement signed.
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Dimensions: 125 x 100 x 58 mm
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Signed: August Ericsson  St. Petersburg
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The dial is slightly chipped.
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August Ericsson (1842 – circa 1910) Born in Sweden, he established an impressive business in St. Petersburg, Russia (circa 1875). Most of the marine chronometers supplied to the Imperial Navy were by him, and they generally used Kullberg movements. One of his brothers, Bror, founded the Stockholm Watchmakers Association in 1884. One of August’s sons, Alexander, became a chronometer maker.