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.
Buy Now on Jomashop
This is an affiliate link

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 Broadarrow. Strong Lume.

Omega Speedmaster Broadarrow. Strong Lume.

Omega - Speedmaster Broadarrow · $3,450
This Omega Speedmaster Broadarrow features strong lume and runs well.

  • Condition: Runs well
  • Shipping: Fedex with insurance
  • Location: NJ USA
  • References: 800+ references
Posted at
May 9, 2026, 3:40 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Tokyo Gold Green 522.20.42.30.06.001

Omega Speedmaster Tokyo Gold Green 522.20.42.30.06.001

Omega - 522.20.42.30.06.001 · $7,999
Omega Speedmaster Tokyo Gold Green in mint condition, complete with original boxes and papers.

  • Condition: Mint condition with minor wear on the bracelet
  • Bracelet state: has all stickers
  • Extra strap included: yes
  • Strap type: crocodile leather
Posted at
May 9, 2026, 1:59 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Reduced Sapphire Crystal 3539.50 39mm $2,900

Omega Speedmaster Reduced Sapphire Crystal 3539.50 39mm $2,900

Omega - 3539.50 · $2,900
This Omega Speedmaster Reduced is a 39mm watch recently serviced by a professional watchmaker and features a sapphire crystal.

  • Condition: Used, with minor cosmetic damage (nicks around the bezel)
  • Case Size: 39mm
  • Bracelet Length: 18.5cm
Posted at
May 9, 2026, 1:58 PM
Active
View listing on r/WatchExchange
[WTS] 2005 Omega Speedmaster Professional "Sapphire Sandwich" Ref. 3573.50 Watch + Card and Tag - $4,800

2005 Omega Speedmaster Professional "Sapphire Sandwich" Ref. 3573.50 Watch + Card and Tag - $4,800

Omega - 3573.50 · $4,800
This Omega Speedmaster Professional Moonwatch is a stainless steel watch with a sapphire crystal and an Omega 1863 movement, featuring a 42mm diameter case.

  • Condition: Good
  • Case material: Stainless steel
  • Crystal material: Sapphire
  • Movement: Omega 1863
Posted at
May 9, 2026, 12:22 PM
Active
View listing on r/WatchExchange
[WTS] 2020 Omega Speedmaster Moonphase Black 304.30.44.52.01.001 Full Set - $7,995

2020 Omega Speedmaster Moonphase Black 304.30.44.52.01.001 Full Set - $7,995

Omega - 304.30.44.52.01.001 · $7,995
A 2020 Omega Speedmaster Moonphase Black, in excellent condition with minimal signs of wear, featuring a moon phase function and a sleek black design.

  • Condition: Excellent condition with minimal signs of wear
  • Year: 2020
  • Contents: Watch, Inner & Outer Box, Card Holder, International Warranty Card, Pictograms Card, Master Chronometer Card, Instructions Manual
Posted at
May 9, 2026, 11:28 AM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Reduced (automatic)

Omega Speedmaster Reduced (automatic)

Omega - Speedmaster Automatic · $2,300
A beautiful Omega Speedmaster Automatic in good condition, featuring the iconic Speedmaster design in a more wearable 38mm automatic configuration.

  • Condition: Good overall condition for its age, normal signs of wear consistent with age
  • Movement: Automatic chronograph movement
  • Case Material: Stainless steel
  • Crystal: Hesalite
Posted at
May 9, 2026, 9:57 AM
Active
View listing on r/WatchExchange
[WTS] UNWORN Omega Speedmaster ’57 Master Chronometer – BOX & PAPERS – 332.10.41.51.01.001

UNWORN Omega Speedmaster ’57 Master Chronometer – BOX & PAPERS – 332.10.41.51.01.001

Omega - 332.10.41.51.01.001 · $8,000
  • Condition: Unworn
  • Movement: Manual-wind Cal 9906
  • Case material: Stainless-steel
  • Case diameter: 40.5mm
Posted at
May 9, 2026, 8:58 AM
Active
View listing on r/WatchExchange
[WTS] 2026 Omega Speedmaster Professional White Dial 310.32.42.50.04.002 Full Set $7,250

2026 Omega Speedmaster Professional White Dial 310.32.42.50.04.002 Full Set $7,250

Omega - 310.32.42.50.04.002 · $7,250
A modern Moonwatch configuration featuring a lacquered white dial paired with a strap setup, delivering a clean and high-contrast look while maintaining the iconic Speedmaster design.

  • Condition: Like new
  • Case Size: 42mm diameter
  • Case Material: Stainless steel
  • Movement: Manual wind (Omega Calibre 3861 Master Chronometer)
Posted at
May 8, 2026, 9:34 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Professional Moonwatch – Ref. 310.30.42.50.01.001 – Excellent Condition – 2022 - $5,399 🔥🔥🔥

Omega Speedmaster Professional Moonwatch – Ref. 310.30.42.50.01.001 – Excellent Condition – 2022 - $5,399 🔥🔥🔥

Omega - 310.30.42.50.01.001 · $5,399
This Omega Speedmaster Professional Moonwatch features the iconic Hesalite crystal and manual-wind Master Chronometer movement 3861. It's in excellent condition with only extremely light signs of wear and is running strong with warranty left for peace of mind.

  • Condition: Excellent, minimal hairline scratches.
  • Case Size: 42mm
  • Movement: Manual-wind Co-Axial Master Chronometer (Cal. 3861)
  • Crystal: Hesalite
Posted at
May 8, 2026, 9:28 PM
Active
View listing on r/WatchExchange