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 Date ref. 3212.80.00 40mm | Great Condition (with Box, Booklet, Cards & Serviced) | $2750

Omega Speedmaster Date ref. 3212.80.00 40mm | Great Condition (with Box, Booklet, Cards & Serviced) | $2750

Omega - 3212.80.00 · $2,750
The Omega Speedmaster Date ref. 3212.80.00 features a versatile and often overlooked chapter in the Speedmaster lineage that blends classic chronograph functionality with everyday wearability. The watch is housed in a well-proportioned 40mm stainless steel case, making it suitable for a wide range of wrist sizes.

  • Condition: Great condition with little sign of wear
  • Case size: 40mm
  • Bracelet length: up to 19cm (7.5inches)
  • Water resistance: 100m
Posted at
May 26, 2026, 12:42 AM
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[WTS] Omega Speedmaster Moonphase Chronograph 44mm, 2025, Complete Set, $8,500

Omega Speedmaster Moonphase Chronograph 44mm, 2025, Complete Set, $8,500

Omega - Speedmaster Moonphase Chronograph · $8,500
This Omega Speedmaster Moonphase Chronograph features a black sun brushed dial and ceramic tachymeter bezel. The watch includes a microstructured metallic crystal disc that shows actual lunar detail.

  • Condition: Excellent
  • Movement: Calibre 9904
  • Bracelet material: Steel
Posted at
May 26, 2026, 12:32 AM
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[WTS] Rare Vintage Omega Speedmaster Teutonic Gray Dial Bead-Blasted Case Hand Wound Ref Ref 145.0044

Rare Vintage Omega Speedmaster Teutonic Gray Dial Bead-Blasted Case Hand Wound Ref Ref 145.0044

Omega - 145.0044 · $2,750
A rare vintage Omega Speedmaster Teutonic ref 145.0044 in a unique gray dial with a bead-blasted case, manual wound cal 861 movement, and an integrated stainless steel bracelet.

  • Condition: Pre-owned, with wear (scratches and nicks) but still looks great while wearing
  • Case Size: 42MM diameter
  • Movement Type: Manual wound Omega cal 861
  • Bracelet Length: fits up to app 7.25 inches
Posted at
May 25, 2026, 7:54 PM
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[WTS] Omega Speedmaster Professional - Apollo XVII 17 Limited 45th Anniversary - 311.30.42.30.03.001

Omega Speedmaster Professional - Apollo XVII 17 Limited 45th Anniversary - 311.30.42.30.03.001

Omega - 311.30.42.30.03.001 · $7,695
This is the highly collectible Apollo XVII 45th Anniversary Limited Edition, featuring the striking blue dial and unique commemorative caseback design.

  • Condition: Good overall pre-owned condition with normal wear throughout
  • Size: 42mm diameter
  • Caseback Design: Commemorative
Posted at
May 25, 2026, 6:39 PM
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[WTS] Omega Speedmaster Professional "Hesalite" 311.30.42.30.01.005 - $3999

Omega Speedmaster Professional "Hesalite" 311.30.42.30.01.005 - $3999

Omega - 31130423001005 · $3,999
For sale is my beloved Omega Speedmaster Professional Hesalite Moonwatch, a discontinued model with a caliber 1861 movement, running within spec at +7s/d.

  • Condition: Pre-owned with wear on the clasp
  • Caliber: 1861
  • Box Contents: inner, outer boxes, manuals
Posted at
May 25, 2026, 4:42 PM
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[WTS] Omega Speedmaster "Grey Side of the Moon” – 311.93.44.51.99.001 – Full Set

Omega Speedmaster "Grey Side of the Moon” – 311.93.44.51.99.001 – Full Set

Omega - 311.93.44.51.99.001 · $7,750
This Omega Speedmaster features a grey ceramic case and sandblasted platinum 'Lunar Dust' dial, giving it a stealthy and futuristic look while still feeling classic and classy.

  • Condition: Excellent
  • Case Size: 44.25mm
  • Movement: Omega Co-Axial Caliber 9300 chronograph movement
Posted at
May 25, 2026, 4:25 PM
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[WTS][US] Omega Speedmaster Moonwatch Professional - White Dial - 42mm- 310.30.42.50.04.001 - Full Set

[US] Omega Speedmaster Moonwatch Professional - White Dial - 42mm- 310.30.42.50.04.001 - Full Set

Omega - 310.30.42.50.04.001 · $8,175
Omega Speedmaster Moonwatch Professional - White Dial in 42mm case size.

  • Condition: pristine with minor hairlines on clasp, case, or bracelet
  • Case Size: 42mm
Posted at
May 25, 2026, 1:55 PM
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[WTS] Omega Speedmaster 3590.50 Serviced with Extra Omega Straps

Omega Speedmaster 3590.50 Serviced with Extra Omega Straps

Omega - 3590.50 · $4,950
The Omega Speedmaster 3590.50 is a vintage classic from the 1994/95 collection, featuring an original tritium dial and historic caliber 861 movement.

  • Condition: Good
  • Case width: 42mm
  • Year produced: 1994/95
  • Movement manual included: yes
Posted at
May 25, 2026, 1:35 PM
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[WTS] Omega Speedmaster Reduced 3310.10 Vintage 18K Yellow Gold with Steel ($1999)!

Omega Speedmaster Reduced 3310.10 Vintage 18K Yellow Gold with Steel ($1999)!

Omega - 3310.10 · $1,999
A vintage Omega Speedmaster Reduced in 18K yellow gold with a 39mm case, featuring an upgraded 175.0033 dial and running in healthy condition.

  • Condition: Pre-owned with wear, healthy running condition
  • Case size: 39mm diameter
  • Serial date: 1989
Posted at
May 25, 2026, 1:08 PM
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