A Victorian two day marine chronometer with Hartnup balance, c.1870 (mounted in mahogany & brass)

Charles Frodsham, London, No.3582. BOX: three-tier brass-bound with brass drop-down handles with unusual inset hinges, repairer's label pasted to the inside of the second section and inscribed CLEANED/ Jan 1948 by/LILLEY & REYNOLDS, LTD./9, RAILWAY PLACE,/London, E.C.3., brass bowl and gimbal; box key--190 mm. square DIAL: silvered Roman and Arabic dial signed CHARLES FRODSHAM/84 STRAND LONDON/No.3582, 56-hour state up/down at XII and subsidiary seconds at VI, with garter inscribed BY APPOINTMENT TO THE QUEEN at X and Gold Medals of Honour at II, blued steel hands MOVEMENT: with spot-finished plates joined by four ringed pillars, maintaining power to the single chain fusee, the top plate signed Chas. Frodsham & Co. London--100 mm. diameter ESCAPEMENT: Earnshaw-type spring detent with blued steel helical spring to Hartnup's bi-metallic balance; tipsy winding key