SHIP'S CHRONOMETER fully signed on the 4 1/2" diameter silvered dial "JOSEPH SEWILL/61 So. Castle St. Liverpool/Maker to the Admiralty". 56 hour. On either side of the up/down dial are crown devices with info "Prize Medal Awarded 1867/International Exhibition 1862". Within the second hand dial is serial number "12239" and "KEW A" which denotes a class A certificate for performance and accuracy. Roman numerals with 24 hour scale on outer edge of the dial. Blued steel hour, minute, second and up/down hands. Brass gimbal, bowl and locking device all retaining most of their original lacquer finish. Brass bound mahogany box, 7 1/4" x 7 1/4" x 7 3/8" high. Flush mounted brass carrying handles, 2 front escutcheons and a circular ivory plaque engraved "J.  SEWILL/12239/ LIVERPOOL". Condition of everything excellent noting that the small top lid with inset brass corners was replaced by a professional clock cabinetry firm. Outer storage box a later replacement. The Sewill firm had a long history of being makers of high quality and very accurate instruments. Very handsome marine timepiece.