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 3573.50 Box and cards

Omega - 3573.50 · $4,500

Iconic moonwatch in good condition, comes with box and cards.

Condition: good
Box and cards included: true
Shipped: true

Posted at

Feb 10, 2026, 1:23 PM

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2025 OMEGA Speedmaster Moonwatch Pro White 310.30.42.50.04.001 Full Set Price Reduced

OMEGA - 310.30.42.50.04.001 · $7,549

This classic Omega Speedmaster Moonwatch Pro features a white dial and comes with a full set, including boxes, cards, manuals, cleaning cloth, extra links, hang tag, and original receipt.

Condition: Very good condition with minor scratch on the case
Msrp: $9,100
Year: 2025
Diameter: 40.5mm

Posted at

Feb 10, 2026, 1:20 PM

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Omega Speedmaster Pro Sapphire

Omega - 310.30.42.50.01.002 · $5,800

A classic Omega Speedmaster Pro Sapphire in a 42mm Black model.

Condition: Great shape with light surface marks on bracelet
Case size: 42mm diameter
Thickness: 13.18 mm
Movement: Omega 3861

Posted at

Feb 10, 2026, 12:52 PM

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Omega Speedmaster Reduced two-tone

This Omega Speedmaster Reduced is a 39mm two-tone watch with 18k gold details. It runs within +7 seconds per day and has a perfectly working chronograph.

Posted at

Feb 10, 2026, 5:01 AM

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Omega Speedmaster Professional Moonwatch Full Set

Omega - 310.30.42.50.01.001 · $10,900

A timeless and iconic Omega Speedmaster Professional Moonwatch in its traditional hesalite configuration.

Condition: Very good overall condition with very light cosmetic marks on the hesalite crystal.
Case size: 42mm
Crystal type: Hesalite

Posted at

Feb 10, 2026, 1:22 AM

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Omega Speedmaster Legend Schumacher ref 3506.61 PRICE DROP

Omega - 3506.61.00 · $3,900

This is a clean example of the Omega Speedmaster Legend Schumacher reference 3506.61.00 with a striking red dial and special collection engraved case back honoring Michael Schumacher.

Condition: full kit, minimal wear on bracelet
Case diameter: 42mm
Bracelet condition: minimal wear
Shipping included: CONUS shipping fully insured

Posted at

Feb 9, 2026, 6:53 PM

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Omega Speedmaster Day-Date Chronometer ref 3222.80 PRICE DROP

Omega - 3222.80 · $3,200

This Omega Speedmaster Day-Date Chronometer ref 3222.80 features a vibrant blue dial, 40mm case, and stainless steel bracelet with full original links.

Condition: Excellent, minor wear on bracelet
Case size: 40mm diameter
Bracelet condition: minor wear, tiny spot of discoloration on one side
Shipping included: fully insured CONUS shipping

Posted at

Feb 9, 2026, 6:40 PM

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Omega Speedmaster Racing - 329.30.44.51.01.001 - Box and Papers!

Omega - 329.30.44.51.01.001 · $5,950

This Omega Speedmaster Racing Chronograph is a pre-owned watch in good condition, featuring a 44.25mm case and a stainless steel bracelet.

Condition: Pre-owned with minor wear
Case size: 44.25mm diameter
Bracelet material: Stainless steel

Posted at

Feb 9, 2026, 5:49 PM

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2025 Omega Speedmaster Racing 44mm - 329.32.44.51.01.001 - Price Reduced!

Omega - 329.32.44.51.01.001 · $6,095

This Omega Speedmaster Racing features a bold design with orange racing accents and the Caliber 9900 Master Chronometer movement. It comes with a factory black micro-perforated leather strap and an original Omega wooden presentation box.

Condition: Fantastic preowned condition, barely worn
Movement: Omega Caliber 9900, Co-Axial, anti-magnetic, column-wheel chronograph
Power reserve: approximately 60 hours
Strap: factory black micro-perforated leather racing strap with orange rubber lining

Posted at

Feb 9, 2026, 5:47 PM

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