URBAN JURGENSEN 'THE KRUSENSTERN' CHRONOMETER ROSE GOLD
Urban Jurgensen, Copenhagen, No. XI made in 1812.
Highly important, exquisitely made and very rare 18K rose gold pocket Chronometer with Arnold spring detent Chronometer escapment.
OUTER Two-body polished, massive case in 18K gold with punchmarked IFH in
a heart for the case maker Johan Fridrich Hansemann,with ''Fra FR VI til Commandeur
V Krusenstern'' engraved, INNER Two-body, "bassine", polished, 18K gold
with punchmarked IFH.
White enamel with radial Roman numerals, outer minute track, large subsidiary
seconds, Blue steel spade hands.
49 mm. frosted gilt, bridge calibre, fusee with chain and Harrison's maintaining
power, gold train, winding square surrounded by a dust pipe fixed on the top of the
unusual bridge for the fusee and barrel. Arnold's spring detent escapement mounted
on a platform to be easily adjusted by a screw. Cut bimetallic compensation
balance with two arms, peripheral gold temperature adjustment screws, balance
and escape wheel pivots jeweled in screwed chatons, helical balance spring.