Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference 310.55.42.50.13.001

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet is a masterpiece of horology, blending art, history, and cutting-edge technology. Crafted from Sedna Gold, this watch boasts a unique color that's both warm and striking. Its round shape and sunburst brown finish give it a luxurious feel, while the diamond-set bezel adds a touch of elegance. The 3861 is equipped with a chronograph feature, allowing you to measure elapsed time with precision. At its heart lies the Omega caliber 3861, an updated version of the legendary caliber 861/1861, featuring a co-axial escapement and silicon balance spring for accuracy and reliability. Master Chronometer certified by METAS, this watch has undergone rigorous testing to withstand magnetic fields of up to 15,000 gauss. Its sleek design and exceptional craftsmanship make it a standout in any collection. Whether you're at a formal event or a casual outing, this watch is sure to turn heads.
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Key Features

  • Sedna Gold case
  • Manual-winding chronograph movement
  • Co-axial escapement and silicon balance spring
  • Master Chronometer certified by METAS
  • Diamond-set bezel
  • Water resistance up to 50 meters
  • 42.00 mm diameter and 13.18 mm height

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet
Reference
310.55.42.50.13.001
Movement
3861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
  • Chronometer
Case
Sedna Gold 42mm
Dial Color
Brown
Crystal
Sapphire
Water Resistance
50

Current Listings

1991 Omega Speedmaster Ref: 3590.50 with Accessories

1991 Omega Speedmaster Ref: 3590.50 with Accessories

Omega - 3590.50 · $3,550.004
A 1991 Omega Speedmaster Ref: 3590.50 with a 42mm case, excellent condition black bezel, and tritium dial with creamy yellow patina.

  • Condition: Very nice with some wear from use
  • Serial number: 48,26X,XXX
  • Bracelet size: 20 links (+1 spare) and 633 end links
  • Bracelet type: 1171/1 Omega bracelet
Posted at
Apr 28, 2025, 8:42 PM
Active
1991 Omega Speedmaster Ref: 3590.59 Apollo XI 20th Anniversary with Box and Papers

1991 Omega Speedmaster Ref: 3590.59 Apollo XI 20th Anniversary with Box and Papers

Omega - 3590.59 · $6,950.007
This is a 1991 Omega Speedmaster Ref 3590.59 Apollo XI 20th Anniversary, a limited edition made for the US market. The watch features a 42mm case with some wear from use and a ding on the side of the 10 o'clock lug.

  • Condition: Very good
  • Case size: 42mm
  • Bracelet type: stainless steel 1479 Omega bracelet
  • Links: 23 links and 812 end links
Posted at
Apr 28, 2025, 8:41 PM
Active
1992 Omega Speedmaster Ref: 3590.50

1992 Omega Speedmaster Ref: 3590.50

Omega - 3590.50 · $3,850.004
A 1992 Omega Speedmaster Ref: 3590.50 in excellent condition, featuring a 42mm case, black bezel, tritium dial, and Omega bracelet.

  • Condition: Excellent with some light wear and corrosion
  • Case Size: 42mm diameter
  • Bracelet Links: 22
Posted at
Apr 28, 2025, 8:40 PM
Active
1999 Omega Speedmaster Broad Arrow Ref: 3594.50 with Box and Papers

1999 Omega Speedmaster Broad Arrow Ref: 3594.50 with Box and Papers

Omega - 3594.50 · $3,550.004
This is a 1999 Omega Speedmaster Broad Arrow Ref: 3594.50, a chronograph watch with a 42mm case and stainless steel bezel, featuring a black dial with Luminova stick markers and broad arrow hands.

  • Condition: Excellent
  • Case size: 42mm
  • Bracelet links: 15
  • Bracelet end links: 840
Posted at
Apr 28, 2025, 8:40 PM
Active
[WTS] Omega Speedmaster FOIS Moonwatch, Box+ Papers

Omega Speedmaster FOIS Moonwatch, Box+ Papers

This Omega Speedmaster FOIS Moonwatch features a 39.7'' case diameter, Hesalite-like form, scratch-resistant sapphire crystal, and blue/gray dial.

  • Condition: Great Preowned condition
  • Case diameter: 39.7 inches
  • Crystal material: scratch-resistant sapphire with anti-reflective treatment inside
Posted at
Apr 28, 2025, 7:10 PM
Active
Omega Speedmaster Tokyo 2020 Slate Green Sedna Gold

Omega Speedmaster Tokyo 2020 Slate Green Sedna Gold

Omega - 522.20.42.30.06.001 · $6,999.007
This Omega Speedmaster Tokyo 2020 Edition features a slate dial and green bezel, crafted from Sedna gold. Limited to 2020 pieces, this watch is part of a special Olympic box set.

  • Condition: Pre-owned with minor marks
  • Limited edition: 2020 pieces
  • Year introduced: 2021
Posted at
Apr 28, 2025, 4:03 PM
Active
[WTS] Omega Speedmaster Professional Moonwatch Full Steel Tritium Dial Blue Insert 1970’s (Unpolished)

Omega Speedmaster Professional Moonwatch Full Steel Tritium Dial Blue Insert 1970’s (Unpolished)

Omega - 145.022 · $4,650
A remarkable example of the iconic Omega Speedmaster Moonwatch, preserved in its original condition with a known provenance. The black tritium dial and hands display a rich patina across the indices, paired with an original bezel insert that has developed a striking blue hue.

  • Condition: Unpolished, original condition with patina
  • Size: 42mm diameter
  • Year: 1970s
  • Bracelet stretch: minimal
Posted at
Apr 28, 2025, 3:59 PM
Active
[WTS] Omega Speedmaster Professional Moonwatch ( 310.30.42.50.01.001 ) - Full Kit

Omega Speedmaster Professional Moonwatch ( 310.30.42.50.01.001 ) - Full Kit

This is a 42mm Omega Speedmaster Professional Moonwatch with a complete set.

  • Condition: great condition, small scratches around the watch
  • Material: stainless steel
  • Size: 42mm diameter
Posted at
Apr 28, 2025, 3:49 PM
Active
Omega Speedmaster Racing – Complete Set

Omega Speedmaster Racing – Complete Set

Omega - 329.32.44.51.06.001 · $6,335.006
This Omega Speedmaster Racing Master Chronometer features a 44.25mm stainless steel case on a brown leather strap with a black ceramic bezel ring and is powered by the OMEGA Co-Axial Master Chronometer 9900 movement.

  • Condition: Excellent, Mint condition with few signs of wear
  • Case material: Stainless Steel
  • Diameter: 44.25 mm
  • Movement type: Self-winding
Posted at
Apr 28, 2025, 3:48 PM
Active