A Victorian two-day marine chronometer Thomas Porthouse, No. 6440, circa 1840 The silvered dial signed and numbered Thomas Porthouse Maker to the Admiralty. 10 Northampton Squre LONDON 6440 , Roman hour numerals, gold hour and minute (repaired) hands, subsidiary seconds dial with blue steel hand, up-and-down dial with gold hand, small size movement (56 mm. diam.), Earnshaw escapement, cut bimetallic balance with segmental heat compensation weights, blued steel helical balance spring, dovetail spring detent with jewelled locking stone, the movement enclosed within a brass drum dust cover with bayonet fittings, brass bowl and gimbal, three-tier mahogany box with brass corners to base of bottom section and top lid, the middle section with inset small rectangular bone plaque (unsigned) brass external drop handles, convex glass to bezel 86 mm. dial diam., 135 mm. sq. box
A Victorian two-day marine chronometer Thomas Porthouse, No. 6440, circa 1840 The silvered dial signed and numbered Thomas Porthouse Maker to the Admiralty. 10 Northampton Squre LONDON 6440 , Roman hour numerals, gold hour and minute (repaired) hands, subsidiary seconds dial with blue steel hand, up-and-down dial with gold hand, small size movement (56 mm. diam.), Earnshaw escapement, cut bimetallic balance with segmental heat compensation weights, blued steel helical balance spring, dovetail spring detent with jewelled locking stone, the movement enclosed within a brass drum dust cover with bayonet fittings, brass bowl and gimbal, three-tier mahogany box with brass corners to base of bottom section and top lid, the middle section with inset small rectangular bone plaque (unsigned) brass external drop handles, convex glass to bezel 86 mm. dial diam., 135 mm. sq. box
Testen Sie LotSearch und seine Premium-Features 7 Tage - ohne Kosten!
Lassen Sie sich automatisch über neue Objekte in kommenden Auktionen benachrichtigen.
Suchauftrag anlegen
.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
