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 OEM Rubber Strap & Deployant Clasp

Omega Speedmaster OEM Rubber Strap & Deployant Clasp

Omega - Speedmaster · $500
Up for sale is an Omega Speedmaster's OEM rubber strap and its clasp, in excellent condition. The deployant clasp was not used due to personal preference.

  • Material: rubber
  • Clasp type: deployant
Posted at
May 4, 2026, 3:20 PM
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[WTS] Omega. Speedmaster. Reverse Panda. Complete Set. $2099 Only

Omega. Speedmaster. Reverse Panda. Complete Set. $2099 Only

Omega - Speedmaster. Reverse Panda · $2,099
A complete Omega Speedmaster Reverse Panda set, featuring a 39mm case on an OEM bracelet designed for wrists up to 7 inches in circumference.

  • Condition: 7.75/10 with wear around bezel and some flea bites on crystal
  • Bracelet size: 39mm diameter can fit ~7inch wrist with 20 links
  • Box condition: complete
Posted at
May 4, 2026, 2:57 PM
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[WTS] Omega Speedmaster Date 3513.50 – 39mm Automatic Chronograph – Black Dial – Full Set Serviced Price : 2350$

Omega Speedmaster Date 3513.50 – 39mm Automatic Chronograph – Black Dial – Full Set Serviced Price : 2350$

Omega - 3513.50 · $2,350
This classic Omega Speedmaster Date ref. 3513.50 is a 39mm automatic chronograph with a black dial, part of the less-highly-regarded Speedmaster line. It's perfect for everyday wear with its iconic Speedy DNA.

  • Condition: Very good used condition, minor scratches on case and strap
  • Case size: 39mm diameter
  • Thickness: ~14mm
  • Lug width: 18mm
Posted at
May 4, 2026, 1:18 PM
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[WTS] Omega Speedmaster Date 3211.31.00 — 40mm Panda Dial — Cal. 1164 (Fresh Service) — $2,399 Shipped (Tariff Covered)

Omega Speedmaster Date 3211.31.00 — 40mm Panda Dial — Cal. 1164 (Fresh Service) — $2,399 Shipped (Tariff Covered)

Omega - 3211.31.00 · $2,399
This Omega Speedmaster Date features a clean silver panda dial with black subdials and red accents, powered by Cal. 1164 with chronograph functions that operate as they should.

  • Condition: Pre-owned with honest wear
  • Case size: 40mm diameter
  • Lug-to-lug length: 46mm
  • Thickness: 15mm
Posted at
May 4, 2026, 1:13 PM
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[WTS] Omega Speedmaster Racing - 329.30.44.51.01.001 - Box and Papers - Price Reduced!

Omega Speedmaster Racing - 329.30.44.51.01.001 - Box and Papers - Price Reduced!

Omega - 329.30.44.51.01.001 · $5,695
A pre-owned Omega Speedmaster Racing Chronograph in good condition, featuring a 44.25mm size and coming with its original box, papers, and stainless steel bracelet.

  • Condition: pre-owned with minor wear
  • Size: 44.25mm
  • Bracelet material: stainless steel
  • Payment methods: Zelle, bank wire, or PayPal F&F
Posted at
May 4, 2026, 1:11 PM
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[WTS] Omega Speedmaster Broad Arrow Ref. 321.10.44.50.01.001

Omega Speedmaster Broad Arrow Ref. 321.10.44.50.01.001

Omega - 321.10.44.50.01.001 · $3,600
This Omega Speedmaster Broad Arrow features a 44mm stainless steel case, automatic Co-Axial Caliber 3313 movement, and a textured black dial.

  • Condition: Great condition overall, sapphire crystal clean, textured black dial pristine, stainless steel case shows light wear, automatic movement running good
  • Case Size: 44mm diameter
  • Movement: Automatic Co-Axial Caliber 3313
  • Bracelet Length: fits a 7.5in wrist
Posted at
May 4, 2026, 12:58 PM
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[WTS] Omega Speedmaster 39mm Automatic 3513.82.00 Blue Dial — Cal. 1152 (Serviced) — $2,100 Shipped (Tariff Covered)

Omega Speedmaster 39mm Automatic 3513.82.00 Blue Dial — Cal. 1152 (Serviced) — $2,100 Shipped (Tariff Covered)

Omega - 3513.82.00 · $2,100
This Omega Speedmaster is a 39mm automatic watch featuring a Cal. 1152 movement and a blue dial.

  • Movement: Cal. 1152
  • Size: 39mm diameter
Posted at
May 4, 2026, 11:48 AM
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[WTS] Omega Speedmaster Reduced 3510.50 Mint Full Set $3200

Omega Speedmaster Reduced 3510.50 Mint Full Set $3200

Omega - 3510.50 · $3,200
A beautiful Omega Speedmaster Reduced with a matte black Luminova dial, stainless steel case with twisted lugs, and an automatic Omega caliber 3220 movement.

  • Condition: Mint
  • Movement: Automatic Omega caliber 3220 (ETA 2890-2 with Dubois- Depraz chronograph module)
  • Case size: 39mm diameter
  • Bracelet type: Omega 1469
Posted at
May 4, 2026, 8:51 AM
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[WTS][US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

[US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

Omega - 310.30.42.50.01.004 · $10,750
This Omega Speedmaster Moonwatch Professional features a 42mm case and is in full set with its original box, papers, and accessories.

  • Condition: Brand new, unworn, and in pristine condition
  • Case size: 42mm diameter
  • Movement type: mechanical
Posted at
May 4, 2026, 7:32 AM
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