English chronometer with eight day power reserve Circa 1795

Chronometer with spring detent escapement
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An early marine chronometer with a small eight day power reserve indicator made by Thomas Earnshaw in London, England, circa 1795. The brass case of this watch would have originally been gimbal suspended in a wooden box. The original silvered dial features Roman hour numerals, an outer minute track, subsidiary seconds 6 o’clock, a power reserve indicator at 12, blued steel spade hands and is marked New Balance Spring & Balance. The movement is fitted with Thomas Earnshaw’s spring detent chronometer escapement and a diamond endstone.
The signature on the dial was probably added later.
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Diameter: 90 mm
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Signed: E.J. Dent London 
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The chronometer presented here is exceptionally rare and of very early manufacture. A chronometer by Earnshaw of comparable size, though fitted with a one day movement, is held in the Science Museum, London, where it illustrates a fine example of the suspension and its original wooden case. Another comparable one day chronometer is preserved in the British Museum, London. Small, early chronometers by Thomas Earnshaw are seldom offered on the market and are highly sought after by collectors.
A two day chronometer of this size was previously sold for CHF  25.000.