T.S. & J.D. NEGUS, NO. 1916, CIRCA 1875
細節
An American two-day marine chronometer
T.S. & J.D. Negus, No. 1916, circa 1875
The silvered dial signed T.S. & J.D. NEGUS. NEW YORK, No. 1916, Roman hour numerals with Arabic five minute intermarkers 60-5-10 et seque, gold hour and minute hands, subsidiary seconds and up-and-down dials with blued steel hands, Earnshaw escapement, cut bimetallic balance with cylindrical heat compensation weights, blued steel helical balance spring, replacement spring foot detent with jewelled locking stone, brass bowl and gimbal, three-tier brass bound rosewood box, the middle section with inset rectangular unsigned bone ivory plaque, flush recessed brass handles
103 mm. dial diam., 185 mm. sq. box
T.S. & J.D. Negus, No. 1916, circa 1875
The silvered dial signed T.S. & J.D. NEGUS. NEW YORK, No. 1916, Roman hour numerals with Arabic five minute intermarkers 60-5-10 et seque, gold hour and minute hands, subsidiary seconds and up-and-down dials with blued steel hands, Earnshaw escapement, cut bimetallic balance with cylindrical heat compensation weights, blued steel helical balance spring, replacement spring foot detent with jewelled locking stone, brass bowl and gimbal, three-tier brass bound rosewood box, the middle section with inset rectangular unsigned bone ivory plaque, flush recessed brass handles
103 mm. dial diam., 185 mm. sq. box