Arnold & Son Ultrathin Tourbillon Skeleton Red Gold

Technical specifications


  • Hours
  • Minutes
  • Flying Tourbillon


  • Manual Winding
  • Manufactured
  • Swiss Made


  • Round
  • Red Gold
  • Polished
  • 8.40mm
  • 41.50mm


  • Sapphire

Water resistance

  • 3.00atm / 30.00m / 100.00ft


  • Deployment Buckle
  • Red Gold & Titanium


  • Alligator
  • Blue


  • 2024

Official description

With its graceful curves and wide apertures, Ultrathin Tourbillon Skeleton also stands out for its slimness. Its new case, with a diameter of 41.5 mm and a thickness of 8.4 mm, presents the flying tourbillon calibre in its purest expression. The Ultrathin Tourbillon Skeleton collection, adorned in red gold or platinum, is issued in two limited series featuring 28 watches apiece.

Arnold & Son continues its tour of the Ultrathin Tourbillon collection. The A&S8320 calibre unveils its curves, apertures and details within a 41.5 mm case in either red gold (5N) or platinum (PT 950), each released in a run of 28 timepieces. Encased in this precious housing, Arnold & Son’s flying tourbillon stands out for its finesse and precision.

Finesse, because at just 3.3 mm thick, it is one of the slimmest skeleton tourbillon calibres in existence. Precision, because this one-minute flying tourbillon is assembled with a variable-inertia balance for enhanced calibration stability.