27 piecesSingularity Sapphire Tourbillon
Flying tourbillon, 41 mm sapphire
$186,000
A case milled from one block of sapphire, so the whole movement floats in light.
DiscoverHey there, meet A.R.I.A,
Kerr's Adaptive Response Interface Agent
Welcome to Kerr. Time runs slower near the horizon, so take yours. What brings you in?
Every Kerr begins as a cloud of parts.
Assembled at the edge of time.
New, 27 pieces
Singularity Sapphire Tourbillon
A case milled from one block of sapphire, so the whole movement floats in light.
- Sapphire caseMilled from a single block over 400 hours. At 9 on the Mohs scale, it shrugs off keys and steel.
- Flying tourbillonNo upper bridge. The cage turns once a minute in open air.
- Skeleton movementCalibre K-T1, cut back to its bones and finished by hand.
- 72-hour reserveTake it off on Friday, it is still running on Monday.
$186,000
Time runs slower near the horizon.
Gravity stretches time. Hover close to a black hole and your watch still keeps perfect time, while everyone far away races ahead. Slide toward the edge and the camera follows you in.
Far awayEvent horizon
One hour on your wrist is
1 h 6 min on Earth
dτ/dt = √(1 − rs/r) = 0.9129
rs is the Schwarzschild radius, where the event horizon sits. The formula is for a clock held still outside a non-spinning hole. A Kerr keeps your time anywhere. It just can't slow down anyone else's.
The collection.
Every piece, side by side.
Ten watches, from a racing chronograph to a case milled from sapphire. Each is assembled and regulated by one watchmaker, whose initials sit inside the caseback.
27 pieces
Astraea Genesis Tourbillon
Meteorite dial, 42 mm rose gold
$96,000
Aethelgard Skeleton Tourbillon
Integrated bracelet, 41 mm platinum
$138,000
Firmament Celestial
Sky chart and moon phase, 42 mm white gold
$74,000
Horizon Perpetual Calendar
Perpetual calendar, 40 mm rose gold cushion
$62,000
Photon Rattrapante
Split-seconds chronograph, 41 mm steel
$48,500
Taurus 12 Chronograph
Racing chronograph, 42 mm steel and rose gold
$12,900
Accretion Tonneau Tourbillon
Skeleton tourbillon, 44 × 38 mm steel
$112,000
Corona Skeleton Tourbillon
Skeleton tourbillon, 40 mm rose gold
$68,000
Relativity 38
Hand-wound, 38 mm soft-cast gold
$24,000
The watch that looks the way time feels near the horizon: bent.
Discover
Calibre K‑T1. Built to be watched.
The movement inside the Singularity, a few millimetres from the lens. Every part you can see is finished by hand, even the ones nobody will ever look at. Touch a number to see what it does.
- beats an hour
- 21,600
- power reserve
- 72 h
- jewels
- 33
- a day
- ±2 s
- 01Cap jewelThe ruby the balance pivots on. It takes 518,400 beats a day without wearing.
- 02Hand-bevelled bridgeEvery edge angled at 45 degrees and polished by hand, about a day's work.
- 03Flame-blued screwsSteel heated to 290 °C until it turns midnight blue, then polished.
- 04HairspringCoiled finer than a hair. It sets the beat, three times a second.
- 05Gold balanceWeighted at the rim and poised by hand so it swings true in every position.
- 06Gold chatonsRubies set in gold rings, a 19th-century detail most makers dropped.
Not sure which one? Ask A.R.I.A.
Three questions, about thirty seconds. She knows every reference, every dial and how each one sits on a wrist. Prefer a person? and a watchmaker will walk you through them.
A.R.I.A
Kerr concierge
Let's find yours. First, the wrist it's going on?