Urban Jürgensen

A RARE AND FINE SILVER CONSULAR CASED POCKET CHRONOMETER WITH SPRING DETENT ESCAPEMENT, GOLD HELICAL SPRING, REGULATOR DIAL AND FITTED WOODEN DECK BOX, SOLD TO COUNT ADAM WILHELM MOLTKE 1818, 353/8

• Movement: gilt-brass ½ plate using a Houriet garde-temps series ébauche, Arnold-type spring detent escapement, the gold passing spring riveted to the detent, micrometer adjusting screw on separate cock to allow fine adjustment of locking, large three-arm bi-metallic compensation balance with 3 moveable wedge-shaped weights with locking screws to their undersides, the end of each arm of the balance mounted with a timing screw, gold helical spring, diamond endstone, fusee and chain with Harrison's maintaining power, winding square with fusee pipe, signed Urban Jürgensen, CCCLIII, no.VIII
• Dial: white enamel, three subsidiary dials for hours with Roman numerals, minutes with Arabic numeral 15-minute markers, subsidiary seconds with Arabic 15-second markers, blued steel hands, signed Ubran Jürgensen
• Case: silver consular, the back with shuttered winding aperture, plain silver inner hinged cuvette, inside back numbered 452 56 and with maker's mark IFH within heart-shaped cameo for Johan Friedrich Hansemann
• Deck box: two-tier mahogany deck box with fitted holder containing green baize support, the back with sliding panel to access the case back for winding whilst the box is locked and with rectangular compartment for a winding key
diameter 68.5mm

Provenance:
Count A. W. Moltke
Theodor Beyer
Antiquorum Zurich, The Private Collection of Theodor Beyer, 16 November 2003, lot 39