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

Reference 310.55.42.50.51.001

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

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

[WTS] Omega Speedmaster 38 Chronograph 324.30.38.50.02.001 $3999

Omega Speedmaster 38 Chronograph 324.30.38.50.02.001 $3999

Omega - 324.30.38.50.02.001 · $3,999
This Omega Speedmaster 38mm is a chronograph watch in excellent condition, with original stickers still present and includes the box, papers, and an open warranty card.

  • Condition: Like new mint condition
  • Case size: 38mm
  • Features: Chronograph
Posted at
Jan 26, 2026, 1:11 PM
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[WTS] Omega Speedmaster Moonphase 304.33.44.52.03 Blue Dial 44.25mm Full Set

Omega Speedmaster Moonphase 304.33.44.52.03 Blue Dial 44.25mm Full Set

Omega - 304.33.44.52.03.001 · $7,494
The Omega Speedmaster Moonphase features a blue dial and moonphase complication at 6 o'clock, powered by Omega's Co-Axial Master Chronometer automatic movement.

  • Condition: very good
  • Case diameter: 44.25mm
  • Movement type: Co-Axial Master Chronometer automatic
  • Complications: chronograph with moonphase
Posted at
Jan 26, 2026, 10:15 AM
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[WTS] Omega Speedmaster Day Date Chronograph 3220.50 Black Dial 40mm $2,150

Omega Speedmaster Day Date Chronograph 3220.50 Black Dial 40mm $2,150

Omega - 3220.50 · $2,150
Omega Speedmaster Day Date Chronograph with a black dial and 40mm case size.

Posted at
Jan 26, 2026, 9:04 AM
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OMEGA SPEEDMASTER PROFESSIONAL MOONSWATCH 35735000 *FULL SET* (B&P) [WTS] $5750

OMEGA SPEEDMASTER PROFESSIONAL MOONSWATCH 35735000 *FULL SET* (B&P) $5750

Omega - 35735000 · $5,750
Full set, Speedmaster Professional Moonwatch in a box (B&P)

  • Set: full set
Posted at
Jan 25, 2026, 9:40 PM
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[WTS] Omega Speedmaster Broad Arrow 321.10.42.50.01.001 2019 $3,999 [USA]

Omega Speedmaster Broad Arrow 321.10.42.50.01.001 2019 $3,999 [USA]

Omega - 321.10.42.50.01.001 · $3,999
This Omega Speedmaster Broad Arrow is from 2019 with a crisp case and running perfectly. It comes on a massive bracelet that can fit most wrists.

  • Condition: Incredible-condition
  • Dimensions: 42mm diameter
  • Year: 2019
Posted at
Jan 25, 2026, 7:31 PM
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[WTS] 2007 Omega Speedmaster Date 3210.50 - $2,299

2007 Omega Speedmaster Date 3210.50 - $2,299

Omega - 3210.50 · $2,299
An Omega Speedmaster Date Chronograph ref. 3210.50 from 2007 in good overall condition, featuring a black dial and stainless steel bracelet.

  • Condition: Good overall condition, signs of wear
  • Case size: 40mm diameter
  • Serial number: 81.6M (circa 2007)
  • Dial color: Black
Posted at
Jan 25, 2026, 7:16 PM
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[WTS] Omega Speedmaster Professional Snoopy 50th Anniversary Ref: 310.32.42.50.02.001 BNIB

Omega Speedmaster Professional Snoopy 50th Anniversary Ref: 310.32.42.50.02.001 BNIB

Omega - 310.32.42.50.02.001 · $12,700
This Omega Speedmaster Snoopy 50th Anniversary watch is a brand new, unworn model with a complete package and extra travel box.

  • Condition: Brand new, never worn (BNIB)
  • Case Size: 40mm diameter
  • Water Resistance: unknown
  • Warranty: valid until end of 2025
Posted at
Jan 25, 2026, 6:07 PM
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[WTS] Omega Speedmaster sapphire Sandwich 2021, comes as full set (-2 links) $5,999 shipped

Omega Speedmaster sapphire Sandwich 2021, comes as full set (-2 links) $5,999 shipped

Omega - 310.30.42.50.01.002 · $5,999
Up for sale is a Omega Speedmaster sapphire sandwich from 2021, comes as full set with original inner/outer box and papers.

  • Condition: Excellent
  • Year: 2021
  • Case Size: 42mm
  • Material: Stainless Steel
Posted at
Jan 25, 2026, 3:52 PM
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[WTS] Omega Speedmaster "First Omega in Space" (FOIS) 2024 ed. w/ Box & Papers

Omega Speedmaster "First Omega in Space" (FOIS) 2024 ed. w/ Box & Papers

Omega - 310.30.40.50.06.001 · $7,100
This Omega Speedmaster "First Omega in Space" (FOIS) is the 2024 edition, featuring a ref. 310.30.40.50.06.001 model number.

  • Condition: very good
  • Year purchased: 2025
  • Box and papers included: true
Posted at
Jan 25, 2026, 2:48 PM
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