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

Genuine (OEM) Omega Speedmaster Apollo 11 50th Anniversary Flat Link Bracelet

Omega · $1,120

The Omega Speedmaster Apollo 11 50th Anniversary Flat Link Bracelet is a sought-after accessory designed exclusively for the limited edition Apollo 11 50th Anniversary 'Moonshine' steel model. It features fully brushed flat links with polished outer edges and a compact, vintage-style clasp.

Condition: Great, lightly used
Lug width: 20mm
Taper: 20mm to 15mm (Dramatic, vintage-style taper)
Material: Stainless Steel

Posted at

May 7, 2026, 10:06 AM

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2025 Omega Speedmaster Sedna Gold 310.60.42.50.01.001 — Like New Condition, Box & Papers

Omega - 310.60.42.50.01.001 · $29,500

The Omega Speedmaster Sedna Gold is a modern take on the iconic Moonwatch design, featuring a rich black dial and matching gold bracelet. It's powered by a Master Chronometer manual-wind movement, blending classic heritage with modern performance.

Condition: Like new, small ding on bezel near 12 o'clock
Box And Papers: Yes
Bracelet Material: Gold
Case Diameter: 42mm

Posted at

May 7, 2026, 9:12 AM

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[US] Omega Speedmaster Moonphase - Black Dial - 44mm - 304.30.44.52.01.001

Omega - 304.30.44.52.01.001 · $6,725

Up for sale is an Omega Speedmaster Moonphase - Black Dial - 44mm watch that functions perfectly mechanically.

Condition: Fantastic condition with minor hairlines on bracelet, clasp, and case
Case size: 44mm diameter

Posted at

May 7, 2026, 6:52 AM

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Omega Speedmaster 3861 Bracelet 020STZ013434

Omega - 3861 Bracelet, 020STZ013434 · $600

Up for sale is an authentic Omega Speedmaster 3861 Bracelet, which fits the 42mm modern and 1861 speedy's.

Condition: like new, barely worn
Lug width: 20mm
Clasp width: 15mm

Posted at

May 6, 2026, 11:40 PM

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Omega Speedmaster Moon to Mars Special Edition

Omega - 3577.50 · $6,500

The Omega Speedmaster Pro 'Moon to Mars' features a beautiful dial with subdials painted as Earth, Moon and Mars.

Condition: good, with a scratch on the crystal at 1 o'clock
Movement: 1861 Manual
Size: 42mm diameter
Bracelet size: fits about 7 inches

Posted at

May 6, 2026, 9:13 PM

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Omega Speedmaster Professional White 42MM - Ref 310.32.42.50.04.002 (NEW 2026 COMPLETE SET)

Omega - 310.32.42.50.04.002 · $7,300

A brand new Omega Speedmaster Professional White, reference number 310.32.42.50.04.002, comes with a complete set including the outer sleeve, box, cards, manuals, and more.

Condition: New
Case size: 42mm
Warranty date: 04/16/2026

Posted at

May 6, 2026, 6:05 PM

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2026 NEW Omega Speedmaster Reverse Panda 310.30.42.50.01.004 Unworn

Omega - 310.30.42.50.01.004 · $9,800

This new Omega Speedmaster Reverse Panda is an unworn modern Speedmaster that comes with the full set, including a stainless steel bracelet and sapphire crystal.

Condition: Like New
Material: Stainless Steel
Bracelet material: Stainless Steel
Size: 42mm diameter

Posted at

May 6, 2026, 4:07 PM

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