AETHER X1
AETHER
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Mechanical time.
Satellite position.

Ref. AX1-44 · Grade 5 titanium

An AX-72 automatic movement keeps the time. A dual-band GPS module tracks the route. Both fit inside a 44 mm titanium case, 12.9 mm thin.

Hands set to your local time--:--:--

Craftsmanship

Crown, case and crystal.

1

Screw-down crown

48 grip ridges and a double O-ring gasket.

2

Grade 5 titanium case

Ti-6Al-4V, 45% lighter than 316L steel.

3

Sapphire crystal

Mohs 9, anti-reflective coating on both sides.

Movement

Eight layers in 12.9 mm.

Z-axis spread0.0 mm

After dark

Readable when the lights go out.

  • Water resistance0mISO 6425 dive standard
  • Power reserve0hFully wound, no battery involved
  • Smart battery0daysWith one hour of GPS a day
  • Shock resistance0gMIL-STD-810H drop tested
C3 lume. Ten minutes of light, eight hours readable.Optical heart rate. 4 LEDs and 4 photodiodes, sampled 25 times a second.

Configure

AETHER X1

44 mm · Grade 5 titanium · AX-72 hybrid

Finish
$1,090or $91/mo for 12 months at 0% APR

Pre-order. Ships from December 2026 in order of purchase.

Drag to turn the watch

Movement + module

Two engines that never share power.

The hands run on a mainspring. GPS, heart rate and notifications run on their own battery. Let one run down and the other carries on.

AX-72 automatic · mainspring

Running

Beat rate
28,800 vph
Beats since midnight
0
Power reserve
72 h, no battery

Smart module · own cell

78%
  • GPS, L1 + L5On
  • Heart rateOn
  • SpO₂On
  • NotificationsOn

14days between charges

Based on 14 days with 1 h of GPS a day, 45 days in power-saving mode and about 30 h of continuous tracking.

Drain the smart module and keep an eye on the seconds hand.

Ref. AX1-44 · Drawing

Specifications

Measured on production samples. The smart module and the mechanical movement run independently. Point at a part to find it on the drawing.

Swipe the drawing for the side and rear views →

Parts list

  1. 1
    Case44 × 12.9 mm, Grade 5 titanium, brushed and polished
  2. 2
    CrystalDomed sapphire, Mohs 9, AR coating on both sides
  3. 3
    BezelZirconia ceramic, 120 clicks, unidirectional, lume pip
  4. 4
    CrownScrew-down, 48 grip ridges, double O-ring gasket
  5. 5
    Hands and indicesC3 luminous paint, also on the bezel pip
  6. 6
    MovementAX-72 automatic, 28,800 vph, 31 jewels, 72 h reserve
  7. 7
    Smart moduleDual-band GPS, L1 + L5, 6-axis IMU, optical heart rate, SpO₂
  8. 8
    CasebackTitanium, sensor window with 4 LEDs and 4 photodiodes
  9. 9
    Strap22 mm FKM rubber, quick-release bars, no tools needed

Notes

  1. Water resistant to 100 m (10 ATM), tested to ISO 6425.
  2. Shock resistant to 5,000 g, MIL-STD-810H drop and thermal cycling.
  3. Battery: 14 days in smart mode, 45 days power-saving, 90 min charge.
  4. Weight 68 g, including strap.
  5. Warranty: 2 years international, 5-year movement service.
  6. All dimensions in mm.
Title
AETHER X1 · AX1-44 case assembly
Material
Ti-6Al-4V, Grade 5
Scale
2:1
Revision
C
Date
2026-10
Drawn by
Aether Horology
Sheet
1 of 1

Questions

Before you order

How do the movement and the smart module work together?

The AX-72 mechanical movement drives the hands and needs no battery. The smart module has its own cell and handles GPS, heart rate and notifications. If the smart module runs flat, the watch keeps time as normal. Try it: run the battery flat

How often do I charge it?

About every 14 days in smart mode, or 45 days in power-saving mode. The magnetic dock charges it fully in 90 minutes. The movement winds itself as you wear it and runs 72 hours when fully wound.

Can I change the strap myself?

Yes. The lugs use 22 mm quick-release spring bars, so any 22 mm strap fits without tools.

When does it ship, and can I return it?

Pre-orders ship from December 2026 in the order they were paid. You can return the watch within 30 days of delivery, and we cover return shipping.

Checkout

Your AETHER X1

This is a demo checkout. Placing the order creates a sample order number on this page. Nothing is charged.

AETHER X1 · TITANIUM GR5 · WATER RESISTANT 100 M · AX-72 AUTOMATIC · REF. AX1-44 · FOR ALEX 10.2026

Your engraving, previewed on the caseback

AETHER X1, Titanium44 mm · Grade 5 titanium · FKM strap
Quantity
1
Subtotal
$1,090
Shipping
Free
Total
$1,090

or $91/mo for 12 months at 0% APR

Caseback engraving · free

  1. 1Pre-order placedToday
  2. 2Regulated in six positionsDial up and down, crown up, down, left and right
  3. 315-day timing testRate checked every day against a reference clock
  4. 4Cased and pressure-testedAt 10 bar, the 100 m rating
  5. 5ShipsFrom December 2026, in order of purchase