Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

Reference 310.55.42.50.51.001

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold is a stunning blend of luxury and functionality, with its Sedna gold construction and intricate chronograph features. The watch's sheer elegance is undeniable, with a black sunburst finish contrasting beautifully with gem-set indexes and ruby accents. Certified as a Master Chronometer by METAS, the Omega caliber 3861 movement is an engineering marvel, resistant to magnetic fields up to 15,000 gauss. With small seconds, hours, and minutes hands, the chronograph functionality offers precision timing. The watch's durability is also noteworthy, with sapphire glass adding scratch resistance. The Sedna gold bracelet ensures a secure fit, while its adjustability makes it comfortable for wearers of all wrist sizes. This timepiece is not just a luxury item but a conversation starter, status symbol, and piece of horological history.
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Key Features

  • Omega caliber 3861 movement with Co-Axial escapement and silicon balance spring
  • Sedna gold construction with gem-set indexes and ruby accents
  • 50m water resistance with sapphire glass scratch resistance
  • Chronograph functionality with small seconds, hours, and minutes hands
  • Adjustable Sedna gold bracelet for secure fit on all wrist sizes

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet
Reference
310.55.42.50.51.001
Movement
3861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
  • Chronometer
Case
Sedna Gold 42mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
50

Current Listings

Omega Speedmaster ’57 331.10.42.51.01.002

Omega Speedmaster ’57 331.10.42.51.01.002

Omega - 331.10.42.51.01.002 · $5,670.006
This Omega Speedmaster '57 Co-Axial Chronograph features a 41.5mm stainless steel case, black dial with twin-register chronograph layout, and is powered by Omega's in-house Co-Axial calibre 9300 movement.

  • Condition: Excellent pre-owned condition
  • Case size: 41.5mm diameter
  • Movement: Co-Axial calibre 9300 with 60-hour power reserve
  • Bracelet material: stainless steel
Posted at
May 6, 2025, 5:15 PM
Active
[WTS] Omega Speedmaster Professional 3590.50 - $3495 Shipped ✈️

Omega Speedmaster Professional 3590.50 - $3495 Shipped ✈️

Omega - 3590.50 · $3,495
This Omega Speedmaster Professional features a Tritium dial and Cal 861 movement, with all functions working well.

  • Condition: Excellent (Watch runs well, all functions work)
  • Size: 7.5 inch wrist size
  • Location: Conus (USA)
Posted at
May 6, 2025, 5:12 PM
Active
[WTS] Omega Speedmaster Professional Moonwatch ( 310.30.42.50.01.001 ) - Full Kit - Reduced

Omega Speedmaster Professional Moonwatch ( 310.30.42.50.01.001 ) - Full Kit - Reduced

This Omega Speedmaster Professional is a 42mm watch with a full kit. It has been used but is in great condition, with some small scratches around the watch and on the bracelet.

  • Condition: Great condition, some small scratches
  • Bracelet condition: Little to no scratches
  • Payment methods: Bank Wire, paypal f&f
Posted at
May 6, 2025, 5:04 PM
Active
[WTS] Omega Speedmaster Reduced 3511.12 Yellow JAPAN 🇯🇵 EXCLUSIVE

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Omega - 3511.12 · $2,275
Additional Details: Omega Speedmaster Reduced, watch comes with box and booklet, 7" bracelet

  • Bracelet length: 7 inch
  • Box and papers included: yes
Posted at
May 6, 2025, 4:31 PM
Active
[WTS] Omega Speedmaster Day Date 3520.50

Omega Speedmaster Day Date 3520.50

Omega - 3520.50 · $1,499
This Omega Speedmaster Day Date is a Triple Date model with an AM strap. It keeps accurate time but requires a new mainspring due to a weak power reserve.

  • Condition: as-is, needs new mainspring and repair of top pusher
  • Case Size: 40mm diameter
  • Material: AM strap
Posted at
May 6, 2025, 4:23 PM
Active
Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (new / 2025)

Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (new / 2025)

Omega - 310.30.42.50.01.002 · $6,750.007
A brand new Omega Speedmaster Moonwatch Professional Sapphire with Adjustable Clasp, featuring a 42mm stainless steel case and 3861 Omega Master Chronometer Movement.

  • Condition: Brand new
  • Case size: 42mm diameter
  • Water resistance: not specified
Posted at
May 6, 2025, 3:19 PM
Active
Omega Speedmaster Moonwatch Hesalite - 3861 - 310.30.42.50.01.001 (new / 2025)

Omega Speedmaster Moonwatch Hesalite - 3861 - 310.30.42.50.01.001 (new / 2025)

Omega - 310.30.42.50.01.001 · $5,950.006
This Omega Speedmaster Moonwatch Professional features a stainless steel case and a Master Chronometer movement, with a hesalite crystal. It comes complete with all boxes, papers, booklets, hang tag, and a 2025 Omega Warranty Card.

  • Condition: Brand New
  • Case size: 42mm
  • Movement type: Master Chronometer
Posted at
May 6, 2025, 3:18 PM
Active
Omega Speedmaster Reduced White Dial Automatic 3510.2000

Omega Speedmaster Reduced White Dial Automatic 3510.2000

Omega - 3510.20.00 · $3,640.004
A white dial Omega Speedmaster Reduced, a chronograph with a mechanical automatic movement, housed in a stainless steel case.

  • Condition: 90%
  • Case Size: 38mm diameter
  • Movement Type: Mechanical Automatic
Posted at
May 6, 2025, 12:47 PM
Active
[WTS] Omega Speedmaster Professional Moonwatch Big Box Set + Omega NATO Strap + Extras

Omega Speedmaster Professional Moonwatch Big Box Set + Omega NATO Strap + Extras

This Omega Speedmaster Professional Moonwatch comes with a big box set and various accessories, including an orange and black Omega NATO strap. The watch is in great condition with the original protective paper box still intact.

  • Condition: Great condition with plastic on the inner briefcase box
  • Straps included: 8
  • Nato strap type: orange and black Omega NATO strap
  • Outer packaging included: outer protective paper box
Posted at
May 6, 2025, 12:28 PM
Active