Details
A two-day chronometer
by T.S. & J.D. Negus, New York, No. 1597, the silvered dial with subsidiary up-and-down and seconds dials, fusee movement with Earnshaw excapement, bimetallic balance with two cylindrical heat compensation weights and helical spring and extra wheel and detent for electrical connection, in lacquered brass gimbal mounting in brass-reinforced mahogany case with glazed inner lid,late 19th century
by T.S. & J.D. Negus, New York, No. 1597, the silvered dial with subsidiary up-and-down and seconds dials, fusee movement with Earnshaw excapement, bimetallic balance with two cylindrical heat compensation weights and helical spring and extra wheel and detent for electrical connection, in lacquered brass gimbal mounting in brass-reinforced mahogany case with glazed inner lid,late 19th century