A CONTINENTAL ONE-DAY MARINE CHRONOMETER Anonymous, No. 123, circa 1875 The frosted silver dial of regulator format with subsidiary hours dial (at XII), Roman hour numerals and arrow-head blued steel hour hand, subsidiary seconds dial (at VI), outer minute chapter with Arabic five minute intermarkers and lance shaped blued steel hand, satin gilt finish pinned full-plate movement, balance bridge with diamond endstone, the balance with three prism-shaped polished steel arms, each separately attached to the three bimetallic sectors forming the balance rim, each sector with milled edge on its underside and carrying laterally adjustable heat compensation weights and mean time screws, grey steel helical balance spring with the top coil pinned to an elongated resilient stud, fifteen tooth escape wheel, pivoted detent, in brass drum-shaped dust cover with underspringing contained in gimballed brass bowl with bolt format locking arm, plain three-tier mahogany box (later top lid) the middle section with bone ivory plaque (unsigned) 73 mm. dial diam., 160 mm. sq. box
A CONTINENTAL ONE-DAY MARINE CHRONOMETER Anonymous, No. 123, circa 1875 The frosted silver dial of regulator format with subsidiary hours dial (at XII), Roman hour numerals and arrow-head blued steel hour hand, subsidiary seconds dial (at VI), outer minute chapter with Arabic five minute intermarkers and lance shaped blued steel hand, satin gilt finish pinned full-plate movement, balance bridge with diamond endstone, the balance with three prism-shaped polished steel arms, each separately attached to the three bimetallic sectors forming the balance rim, each sector with milled edge on its underside and carrying laterally adjustable heat compensation weights and mean time screws, grey steel helical balance spring with the top coil pinned to an elongated resilient stud, fifteen tooth escape wheel, pivoted detent, in brass drum-shaped dust cover with underspringing contained in gimballed brass bowl with bolt format locking arm, plain three-tier mahogany box (later top lid) the middle section with bone ivory plaque (unsigned) 73 mm. dial diam., 160 mm. sq. box
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