Longitude
Longitude Titanium is a COSC-certified chronometer with a power-reserve display and an imposing seconds counter paying tribute to John Arnold’s marine chronometers and his decisive role in calculating longitude at sea.
Gallery
member of the ultrathin league
Ultrathin Tourbillon features a sleek bassiné case made of red gold (5N) or platinum (Pt 950), measuring 41.5 mm in diameter and 8.3 mm in thickness. The bezel has been reduced to a fine metal band, highlighting the exquisite tourbillon mechanism.
off-centred dial as signature
The offset display and the tourbillon aperture echo the way information was arranged on John Arnold’s marine chronometers. With the bezel reduced to a fine metal band, the whole highlights the one-minute flying tourbillon mechanism.
The collection
Ultrathin Tourbillon Red Gold
41.5mm
Ultrathin Tourbillon Platinum
41.5mm
Ultrathin Tourbillon Red Gold
41.5mm
Ultrathin Tourbillon Skeleton Platinum
41.5mm
Ultrathin Tourbillon Skeleton Red Gold
41.5mm
Ultrathin Tourbillon Red Gold “Dragon & Phoenix”
42mm
Ultrathin Tourbillon Red Gold “Dragon & Phoenix”
42mm
Ultrathin Tourbillon Red Gold “Dragon & Phoenix”
42mm
Ultrathin Tourbillon Red Gold “Dragon & Phoenix”
42mm
DESIGN TRIBUTE TO JOHN ARNOLD
The finesse and architecture of the calibre characterizes Ultrathin Tourbillon. The highest point of this movement rests on top of the tourbillon carriage, which features a variable inertia balance with inertia blocks for more stable calibration over time. The tourbillon carriage has been redesigned to reflect John Arnold’s role in marine exploration during the 18th century. Its triangular shape calls to mind a sextant, while its double-arrow counterpoise represents an anchor. The carriage completes a full rotation in one minute, and the point in the middle serves as a seconds marker.
TRADITIONAL HAND-ENGRAVING
The back of Ultrathin Tourbillon reveals a hand-engraved rear tourbillon bridge in yellow gold (3N) that matches the gear train and stands out from the appearance of the rest of the calibre. It offers a power reserve that lasts at least 100 hours, meeting the performance standards of Arnold & Son calibres.
Other collections in Chronometry
Discover collection
Nebula
Since their creation, the fully skeletonised Nebula collection in 38, 40 and 41.5 mm has been a star bursting with light.
DSTB
DSTB, which stands for ‘Dial-Side True Beat’, is one of Arnold & Son’s most personal collections, revealing its true-beat second’s mechanism on the dial side.
Time Pyramid
By arranging the organs of Time Pyramid‘s movement from top to bottom instead of in a circle, Arnold & Son goes beyond the chronometric horizon to achieve an unparalleled feat of design.
Constant Force
Equipped with two barrels to give a 100-hour power reserve, this collection was entirely developed and built at the manufacture in La Chaux-de-Fonds. It is fitted with a constant force mechanism visible on the dial.
HM
The HM Collection is a tribute to timeless refinement, where sleek design meets exceptional craftsmanship.
