Arnold & Son Announces the Ultrathin Tourbillon Skeleton

Last Updated: March 16, 2024Tags: ,

The Ultrathin Tourbillon Skeleton’s elegant curves and expansive open-worked design are further accentuated by its remarkably slim profile. The redesigned case, measuring 41.5mm in diameter and a mere 8.4mm thick, provides a breathtaking showcase for the flying tourbillon movement. Limited to two exclusive series of 28 pieces, each in red gold or platinum, this collection embodies the pinnacle of watchmaking refinement.

Arnold & Son continues to impress with the Ultrathin Tourbillon. Within its sleek case lies the meticulously crafted A&S8320 calibre, its intricate details laid bare. Each watch is a testament to precision and craftsmanship, limited to a production run of just 28 pieces, available in either luxurious red gold or platinum. The flying tourbillon at the heart of this timepiece exemplifies Arnold & Son’s dedication to excellence.

This remarkable movement boasts a remarkably slim profile of only 3.3mm, making it one of the thinnest skeletonized tourbillons on the market. Including a variable-inertia balance ensures exceptional precision in this meticulously crafted one-minute flying tourbillon.

Skeletonization takes on a new dimension in the Ultrathin Tourbillon Skeleton. Its purpose exceeds mere mechanics, revealing a dynamic interplay of curves and angles highlighted by a unique finish. The Red Gold and Platinum models showcase bridges meticulously adorned with radiating Côtes de Genève stripes and finished in a luxurious rose-gold PVD (4N). This same finish extends to the flange, framing the calibre and boldly showcasing the Arnold & Son signature at 6 o’clock. The off-centred white opal dial stands in stark, elegant contrast.

The heart of the Ultrathin Tourbillon Skeleton is the A&S8320 calibre, a masterpiece of architecture and precision. Its ingenious flying tourbillon design eliminates the upper bridge to achieve extraordinary thinness. Precision remains paramount, with a variable-inertia balance featuring inertia blocks ensuring superior timekeeping stability. The delicate triangular carriage, supported by a double-arrow counterpoise, completes each minute’s graceful rotation. The arrowhead on the escape wheel staff doubles as a second indicator.

The masterful redesign of the tourbillon carriage and regulating organ unlocks an impressive 100-hour power reserve within the A&S8320 calibre. While exceeding the capabilities of many standard tourbillons, especially those of comparable thinness, this extended power reserve aligns perfectly with the exceptional level of performance consistently delivered by Arnold & Son timepieces.

Reference red gold: 1UTBR.Z01A.C246R
platinum: 1UTBX.Z01A.C245X
Calibre A&S8320, 1-minute flying tourbillon, manual winding
Functions hours, minutes
Finishes mainplate: skeletonised, rose-gold PVD treatment (4N),
Côtes de Genève stripes radiating from the centre
bridges: skeletonised, rose-gold PVD treatment (4N), polished and chamfered by hand, Côtes de Genève stripes radiating from the centre
wheels: circular satin-finished
screws: blued and chamfered, mirror-polished heads
tourbillon carriage: ‘Arnold & Son’ signature, polished, satin-finished
and chamfered by hand
Dial white opal
Material 18-carat (5N) red gold or platinum (PT 950)
Diameter 41.5 mm
Thickness 8.40 mm (with crystal)
Crystal domed sapphire with an anti-reflective coating on both sides
Strap red gold: blue alligator leather, black alligator leather lining, hand-stitched
platinum: brown alligator leather, black alligator leather lining, hand-stitched
Price red gold: CHF 74,400 incl. tax (subject to change)
platinum: CHF 86,200 incl. tax (subject to change)