Constellation Co‑Axial Master Chronometer 27 Small Seconds Stainless Steel / Diamond / MOP

In Context

At 27 mm this is jewellery scale — a watch sized to be worn as an ornament rather than read across a room. 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. 50 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.

127.15.27.20.55.001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a white dial with a stainless steel case.

Self-winding movement with Co-Axial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15,000 gauss. Free sprung-balance with silicon balance spring. Automatic winding in both directions. Central hour and minute hand, small seconds hand at 9H. Rhodium plated finish with Geneva waves in arabesque.

6 other watches in the library run the Omega 8704.

Omega

Constellation Co‑Axial Master Chronometer 27 Small Seconds Stainless Steel / Red Gold / MOP

127.20.27.20.55.001 · 27 mm

Omega

Constellation Co‑Axial Master Chronometer 27 Small Seconds Stainless Steel / Yellow Gold / MOP

127.20.27.20.55.002 · 27 mm

Omega

Constellation Co‑Axial Master Chronometer 27 Small Seconds Stainless Steel / Red Gold / Diamond / MOP

127.25.27.20.55.001 · 27 mm

Omega

Constellation Co‑Axial Master Chronometer 27 Small Seconds Stainless Steel / Yellow Gold / Diamond / MOP

127.25.27.20.55.002 · 27 mm