Deck Chronometer with Arnold Spring Detent Escapement.Grant, Fleet Street, London, No. 2041. Made circa 1795..Very fine and extremely rare, large gilt-metal, pair-cased pocket and deck chronometer with Arnold
C. Outer: two-body, consular, polished, concealed hinge. Inner: two-body, bassine, polished, master mark AG. D. White enamel.signed Henderson 24 on the reverse, secured by two small screws, eccentric chapter ring with radial Roman numerals, outer minute.divisions and Arabic five-minute numerals, bisecting large subsidiary seconds. Gold spade hands. M. 49 mm., matte gilt, cylindrical.pillars, large aperture for the balance staff, fusee and chain, the barrel with detachable plate with two screws, Harrison’s maintaining.power, Arnold escapement with spring footed-detent, brass bracket with screw for adjusting the depth of the detent, brass escape.wheel, the impulse roller with unusually shaped recess, jeweled discharge roller, cut bimetallic compensation balance with two arms.peripheral gold temperature adjustment screws, balance and escape wheel pivots jeweled in screwed chatons, lower fourth wheel pivot.jeweled for the seconds, blued steel flat balance spring, index regulator..Dial and movement signed and numbered, underside of the balance cock punched I.R, dial plate numbered 25, reverse of dial signed.Henderson 24. Diam. 62 mm.