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] 2024 Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001 Box and Papers

2024 Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001 Box and Papers

Omega - 310.30.42.50.04.001 · $7,277
This is a 2024 Omega Speedmaster Moonwatch Professional with a white dial and reference number 310.30.42.50.04.001. It features an excellent condition case, bracelet, and clasp.

  • Condition: Excellent condition with minimal signs of wear
  • Case size: 42mm diameter
  • Water resistance: 50m water resistant
  • Warranty: 5 year warranty remaining
Posted at
May 27, 2026, 1:41 PM
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[WTS] Omega Speedmaster Moonphase 304.33.44.52.01.001

Omega Speedmaster Moonphase 304.33.44.52.01.001

Omega - 304.33.44.52.01.001 · $7,350
This Omega Speedmaster features a moonphase complication, chronograph, and automatic co-axial movement 9904.

  • Condition: Good pre-owned condition
  • Size: 44.25mm diameter
  • Movement: Automatic co-axial movement 9904
  • Strap: Omega leather strap
Posted at
May 27, 2026, 10:18 AM
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[WTS] Omega Speedmaster Reduced Ref. 3510.50 | Early Tritium Dial Variant | $2700 (SERVICED)

Omega Speedmaster Reduced Ref. 3510.50 | Early Tritium Dial Variant | $2700 (SERVICED)

Omega - 3510.50 · $2,700
The Omega Speedmaster Reduced Ref. 3510.50 is a compact 39mm automatic watch with an early tritium dial variant, carrying the classic black dial, tachymeter bezel, and chronograph layout.

  • Condition: Great condition with some use and minor scratches
  • Diameter: 39mm diameter
  • Thickness: 14mm thickness
  • Lug-to-lug: 44mm lug-to-lug length
Posted at
May 27, 2026, 10:03 AM
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[WTS] OEM Omega Speedmaster rubber strap with Omega deployant clasp

OEM Omega Speedmaster rubber strap with Omega deployant clasp

Omega - Speedmaster · $550
This listing is for an OEM Omega Speedmaster rubber strap with deployant clasp that does not fit the seller due to their wrist size.

  • Material: rubber
Posted at
May 27, 2026, 9:30 AM
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[wts] 2025 Omega Speedmaster Racing 329.30.44.51.04.001 $6999

2025 Omega Speedmaster Racing 329.30.44.51.04.001 $6999

Omega - 329.30.44.51.04.001 · $6,999
This Omega Speedmaster Racing Master Chronometer features a stainless steel case and bracelet with a black ceramic bezel ring and includes the famous tachymeter scale filled with white enamel.

  • Condition: Pre Owned, Cosmetic Condition: 9/10
  • Case size: 44 mm diameter
  • Movement: 9900 caliber
  • Power reserve: 60 hours
Posted at
May 26, 2026, 11:43 PM
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[WTS] Omega Speedmaster Professional Moonwatch – Ref. 311.30.42.30.01.005 – $5,250

Omega Speedmaster Professional Moonwatch – Ref. 311.30.42.30.01.005 – $5,250

Omega - Ref. 311.30.42.30.01.005 · $5,250
This Omega Speedmaster Professional Moonwatch is a high-end timepiece known for its accuracy and style.

  • Serial number: available upon request
Posted at
May 26, 2026, 10:00 PM
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[WTS] Omega Speedmaster Professional Moonwatch – Ref. 311.30.42.30.01.005 $5150

Omega Speedmaster Professional Moonwatch – Ref. 311.30.42.30.01.005 $5150

Omega - 311.30.42.30.01.005 · $5,150
A user's Omega Speedmaster Professional Moonwatch, a family heirloom that has been featured on the PrideAndPinion forum.

  • Year Posted On Forum: four years ago
Posted at
May 26, 2026, 9:47 PM
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[WTS] May 2026 Omega Speedmaster Silver Snoopy BNIB 310.32.42.50.02.001 $15,499

May 2026 Omega Speedmaster Silver Snoopy BNIB 310.32.42.50.02.001 $15,499

Omega - 310.32.42.50.02.001 · $15,499
Up for sale is the Omega Speedmaster “Silver Snoopy Award” 50th Anniversary in brand new condition, widely considered one of the most playful and highly coveted special-edition luxury timepieces ever produced by Omega.

  • Condition: Brand new in box with warranty
  • Case size: 42mm diameter
  • Case thickness: 14.4mm
  • Lug width: 20mm
Posted at
May 26, 2026, 5:18 PM
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[WTS] Omega Speedmaster Racing 329.32.44.51.01.001 + FREE OEM Omega Bracelet

Omega Speedmaster Racing 329.32.44.51.01.001 + FREE OEM Omega Bracelet

Omega - 329.32.44.51.01.001 · $5,799
This Omega Speedmaster Racing features a ceramic tachy bezel, METAS-certified Caliber 9900, and one of the best black/orange dials Omega has put out in years. The orange chrono handset and racing minute track give this watch more personality than the standard Speedy lineup.

  • Condition: Excellent overall condition with only light signs of wear
  • Case size: 44.25mm
  • Water resistance: 100m
  • Movement: Co-Axial Master Chronometer Caliber 9900
Posted at
May 26, 2026, 5:04 PM
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