A fine and original early English marine chronometer. John Moncas is recorded by Britten and Mercer as working between 1818-1836 from 57 Castle and 14 Castle Street, Liverpool.
The three tier mahogany box is of good colour and patination, having early inset brass handles, a diamond shaped bone escutcheon to the lower tier and brass push for the top with internal glass panel to view whilst the box is locked.
The brass gymbal has a screwd latch allowing for the bowl to be locked for transport.
The 4 inch silvered engraved brass dial has Roman numerals with Arabic five minute divisions, signed J. Moncas Liverpool and numbered 2372 within the subsidiary seconds ring, and finely cut blued steel hands. The dial is protected by a screw down bezel fitted with beveled convex glass.
The chain driven fusee movement with a full plain backplate, blued steel screws and steel work has a split bi-metalic balance with auxiliary compensation and steel regulation weights, having blued steel helical balance spring, with Earnshaw type spring detent.
The movement is to be overhauled and guaranteed for 3 years.
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