Constellation Co-Axial 38 Red Gold / Diamond / Diamond

In Context

At 38 mm it sits just under the modern norm — the band that suits the widest spread of wrists. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 100 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

The movement winds itself from the motion of your wrist. 60 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 25,200 vph the seconds hand advances 7 times a second.

123.55.38.20.99.004 stands on its own in this catalogue — no other reference here shares its base number. It pairs a paved dial with a red gold case.

Luxury version of caliber 8400, which is in turn based on 8500. Self-winding movement with Co-Axial escapement for greater precision, stability and durability. Resistant to magnetic fields greater than 15,000 gauss. Free sprung-balance with silicon balance spring, two barrels mounted in series, automatic winding in both directions to reduce winding time. Oscillating weight and balance bridge in red gold. Luxury finish with exclusive Geneva waves in arabesque.

6 other watches in the library run the Omega 8401.

Omega

Seamaster 300 Master Co-Axial Sedna Gold / Black / Bracelet

233.60.41.21.01.001 · 41 mm

Omega

Seamaster 300 Master Co-Axial Yellow Gold / Black / Bracelet

233.60.41.21.01.002 · 41 mm

Omega

Seamaster 300 Master Co-Axial Yellow Gold / Black / Strap

233.62.41.21.01.001 · 41 mm

Omega

Seamaster 300 Master Co-Axial Platinum / Blue / Bracelet

233.90.41.21.03.002 · 41 mm