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

Current Listings

Omega Speedmaster FOIS – Full Set – $4,300 Shipped

Omega - Speedmaster FOIS · $4,300

A manual winding Omega Speedmaster from 2017 with a case size of 39.7mm and Hesalite crystal, presented in full set condition including multiple straps and documentation.

Condition: Very good overall
Case Size: 39.7mm
Movement: Manual winding

Posted at

Jan 24, 2026, 2:38 PM

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2024 Omega Speedmaster “First Omega in Space” 310.30.40.50.06.001 – Full Set – $6,450 Shipped

Omega - 310.30.40.50.06.001 · $6,450

This is a 2024 Omega Speedmaster 'First Omega in Space' reference featuring a 39.7mm case with straight lugs and a vintage-inspired aesthetic, paired with Omega's Master Chronometer technology.

Condition: Excellent
Case size: 39.7mm
Movement: Omega Caliber 3861, Master Chronometer manual-wind chronograph
Water resistance: 50m

Posted at

Jan 24, 2026, 1:20 PM

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Omega Speedmaster Michael Schumacher The Legend Collection $3,450

Omega - 321.30.44.50.01.001 · $3,450

The Omega Speedmaster Michael Schumacher The Legend Collection is a limited edition watch celebrating motorsport and the achievements of Michael Schumacher, featuring a checkered carbon fiber dial and various racing-related details.

Condition: great pre-owned condition
Case Size: 44mm
Lug Width: 21mm
Water Resistance: 100m

Posted at

Jan 24, 2026, 11:31 AM

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Omega Speedmaster. 39mm. White Ceramic. Very nice.

Omega · $3,100

A 39mm white ceramic Omega Speedmaster with strong lume.

Case size: 39mm diameter
Material: white ceramic

Posted at

Jan 24, 2026, 10:54 AM

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Omega Speedmaster Dark Side of the Moon "Vintage"

Omega - 311.92.44.51.01.006 · $6,800

This Omega Speedmaster Dark Side of the Moon 'Vintage' edition is a rare model that no longer exists in production, featuring a black ceramic case and weighing 99 grams with a diameter of 44mm.

Condition: nearly perfect
Case diameter: 44mm
Lug-to-lug measurement: 49mm
Weight: 99 grams

Posted at

Jan 24, 2026, 8:56 AM

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2025 Omega Speedmaster White Dial 42 - $6,799

Omega - Speedmaster · $6,799

This is a modern take on the iconic Speedmaster design featuring a crisp white dial, black tachymeter bezel, and classic chronograph layout. It wears exceptionally well on the wrist and delivers the timeless Speedmaster look with everyday versatility.

Condition: great overall condition
Year: 2025
Dial color: white
Bezel type: black tachymeter

Posted at

Jan 23, 2026, 11:04 PM

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2025 Omega Speedmaster DSOTM Black Black

Omega - 311.92.44.51.01.005 · $8,895

2025 Omega Speedmaster DSOTM Black Black, a completely blacked out variant of the Speedmaster platform, crafted from solid ceramic with polished and brushed case, exhibition caseback, and a deployant clasp. This model is now discontinued.

Condition: like new condition
Case Size: 44.25mm
Movement: Omega Cal 9300 Automatic
Power Reserve: 60hrs

Posted at

Jan 23, 2026, 10:15 PM

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OMEGA Speedmaster "Dark Side of the Moon" Apollo 8 Ref. 311.92.44.30.01.001 + Apollo 8 Gen2 Strap + Deployant Clasp - ULTIMATE SET! 🔥$10,000🔥

OMEGA - 311.92.44.30.01.001 · $10,000

The OMEGA Speedmaster 'Dark Side of the Moon' Apollo 8 commemorates the 50th anniversary of the Apollo 8 mission, featuring a black ceramic case and a skeletonized dial representing the lunar surface.

Condition: UNWORN
Case material: black ceramic
Diameter: 44.25mm
Water resistance: not specified

Posted at

Jan 23, 2026, 9:22 PM

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Omega Speedmaster Broad Arrow - 3594.50 - Excellent Condition

Omega - 3594.50 · $3,599

Up for grabs is an Omega Speedmaster '57 Broad Arrow that is in great condition, with a flawless hesalite crystal and no signs of wear on the bracelet.

Condition: Excellent Condition
Bracelet size: 7.125 inches
Crystal material: Hesalite
Service history: Unknown but possibly recently serviced

Posted at

Jan 23, 2026, 9:17 PM

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