Constellation Manhattan 29 Co-Axial Master Chronometer Sedna Gold / Aventurine

In Context

At 29 mm it is small by current standards, in the range most wristwatches occupied before cases began growing through the 1990s. 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. 50 m covers rain and hand-washing comfortably; it is not a watch to swim in.

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.

131.50.29.20.53.003 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue dial with a sedna gold case.

The 8701 is the 8700 with an 18-carat Sedna gold rotor and balance bridge, fitted to the gold-cased Constellation Manhattan 29. It powers 38 watches in this library, all 29 mm Constellations. The [8700](/calibers/omega-8700) was introduced with the Constellation Manhattan of 2018 to bring the full METAS specification to the 27 mm and 29 mm cases: the co-axial escapement, a silicon balance spring on a free-sprung balance, resistance to 15,000 gauss, bidirectional winding and a 50-hour reserve at 25,200 vph. The 8701 changes only the rotor and the balance bridge, which are made in Sedna gold, Omega's own red gold alloy, so the movement matches the case through the display back. Every reference here is a [Constellation](/brands/omega/constellation) Manhattan 29 in Sedna gold or two-tone, 38 in all, most with diamond bezels and mother-of-pearl dials. The [8807](/calibers/omega-8807) and [8521](/calibers/omega-8521) follow the same gold-rotor convention in the larger cases.

37 other watches in the library run the Omega 8701.

Omega

Constellation Manhattan 29 Co-Axial Master Chronometer Sedna Gold / Blue Aventurine

131.53.29.20.99.001 · 29 mm

Omega

Constellation Manhattan 29 Co-Axial Master Chronometer Yellow Gold / Silver - Diamond

131.53.29.20.52.001 · 29 mm

Omega

Constellation Manhattan 29 Co-Axial Master Chronometer Sedna Gold / Diamond / Green Aventurine

131.58.29.20.99.004 · 29 mm

Omega

Constellation Manhattan 29 Co-Axial Master Chronometer Yellow Gold / Diamond / Silver - Diamond

131.58.29.20.52.001 · 29 mm