Albert H. Potter

An exceptional American eight-day marine chronometer with Potter’s pivoted detent escapement and balance made for pioneering American electrical engineer William Woodnut Griscom, Circa 1880

· gilded movement plates with grained finish, reverse fusee, Potter’s patented pivoted detent escapement with tangential passing spring, Potter’s patented bi-metallic compensation balance with two semi-circular bi-metallic affixes with rotating adjustable screw weights for secondary compensation, blued steel helical spring with terminal curves, main frame assembly signed Albert H. Potter & Co. Escapement Pat Oct. 11. 1875, sub-frame assembly engraved Balance Pat. Oct. 11. 75.

· silvered dial signed Made by Albert H. Potter for W. W. Griscom, Roman numerals, gold hour and minute hands, subsidiary dials for seconds and up-and-down with blued steel hands

· brass bowl, gimballed in a brass-bound mahogany box, inset flush-fitted brass hands, vacant disc aperture to centre front

dial diameter 118mm

box 205mm x 210 x 228mm