English brass eight day marine chronometer in box Circa 1820

Marine chronometer with rare display
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A very early production example of an eight day marine chronometer by the renowned makers Parkinson & Frodsham, at 5 Budge Row London, England, circa 1820.  Housed in a brass case mounted within the original numbered mahogany box with brass fittings and gimbal suspension. The original silvered dial displays Roman hour numerals, a prominent subsidiary seconds dial positioned at 12 o’clock, a rare centrally mounted rotating power reserve indicator calibrated for eight days and the elegantly blued steel hands complete the classic and functional dial design.
The precision movement features a spring detent chronometer escapement with a helical balance spring, showcasing the high level of horological craftsmanship associated with Parkinson & Frodsham during this early period.
Both dial and box bear matching numbers, confirming the originality and integrity of this fine timekeeper and the dial is signed.
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Signed: Parkinson & Frodsham, 5 Budge Row London
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The probably original key is still in the box. Marine chronometers by the important London manufacturer Parkinson & Frodsham are in principle very rare and sought after collectors’ items. Early eight day chronometers of the Barraud design with rotating power reserve display, are real rarities.