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

2024 OMEGA SPEEDMASTER PROFESSIONAL- WHITE DIAL - FULL KIT - $7,800

Omega - 310.30.42.50.04.001 · $7,800

The 2024 White Dial Omega Speedmaster Professional features a glossy, lacquered white stepped dial with applied blackened markers and hands. It is powered by the METAS-certified Master Chronometer Calibre 3861 and viewed through a sapphire exhibition caseback.

Condition: Great condition/minor desk diving
Movement: Manual-winding Calibre 3861 (Anti-magnetic to 15,000 gauss)
Dial size: 42mm
Water resistance: unknown

Posted at

Mar 10, 2026, 9:38 PM

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Omega Speedmaster Moonwatch 310.30.42.50.01.002 - Legendary Timepiece

Omega - 310.30.42.50.01.002 · $6,900

The Omega Speedmaster Professional Moonwatch, reference 310.30.42.50.01.002, is an iconic timepiece that combines precision with timeless design. Featuring a robust stainless steel case and a classic black dial, it's not just a watch—it's a piece of history.

Condition: Good
Case material: stainless steel
Dial color: black

Posted at

Mar 10, 2026, 5:32 PM

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

Omega - 329.30.44.51.01.001 · $5,850

A Omega Speedmaster Racing Chronograph in the model 329.30.44.51.01.001 features a 44.25mm size and has all functions working as expected.

Condition: pre-owned with minor wear
Size: 44.25mm diameter
Bracelet material: stainless steel

Posted at

Mar 10, 2026, 4:54 PM

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Omega Speedmaster First Omega In Space (FOIS)

Omega - 311.32.40.30.01.001 · $4,250

This Omega Speedmaster "First Omega in Space" features a size of 39.7mm and comes with multiple straps.

Case Size: 39.7mm
Strap Count: 6
Includes: Omega boxes,pictogram card,operating instructions booklet

Posted at

Mar 10, 2026, 1:14 PM

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Omega Speedmaster Reduced 3510.50 Mint Full Set $3250

Omega - 3510.50 · $3,250

A beautiful Omega Speedmaster Reduced from 1998, featuring a matte black dial with white inscriptions and a stainless steel case measuring 39mm.

Condition: Mint
Case size: 39mm diameter
Movement: Automatic Omega caliber 3220 (ETA 2890-2 with Dubois-Depraz chronograph module)
Bracelet type: Omega 1469

Posted at

Mar 10, 2026, 9:03 AM

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Omega Speedmaster 3520.53 - $2,690

Omega - 3520.53 · $2,690

Up for sale is my great condition Omega Speedmaster 3520.53, which measures 39mm and has an automatic movement.

Condition: great condition with minor usage marks and patina
Case size: 39mm diameter
Movement type: automatic
Bracelet type: original Omega Steel speedmaster bracelet

Posted at

Mar 9, 2026, 10:04 PM

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Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001 - Full Set - 2025 - Excellent Condition

Omega - 310.30.42.50.04.001 · $8,150

2025 Omega Speedmaster Professional Moonwatch with a white dial, excellent condition, and minimal superficial wear.

Condition: Excellent pre-owned
Case material: Stainless steel
Case diameter: 42mm
Movement type: Manual-winding

Posted at

Mar 9, 2026, 7:51 PM

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Omega Speedmaster Professional Moonwatch

Omega - Speedmaster Professional Moonwatch · $5,900

A brand new Omega Speedmaster Professional Moonwatch with the caliber 1816, purchased at a local AD and barely worn.

Condition: Great condition
Caliber: 1816
Purchase Year: 2021-2022

Posted at

Mar 9, 2026, 7:08 PM

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Omega Speedmaster 38 Co-Axial Chronograph 324.30.38.50.02.001

Omega - 324.30.38.50.02.001 · $3,500

This Omega Speedmaster 38 Co-Axial Chronograph features a silver dial and comes with various accessories, including the original bracelet and inner box.

Condition: Excellent overall condition, very minimal wear
Case material: Stainless steel
Bracelet type: Original Omega stainless steel bracelet
Additional straps: Brown leather strap

Posted at

Mar 9, 2026, 4:41 PM

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