Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference 310.55.42.50.13.001

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet is a masterpiece of horology, blending art, history, and cutting-edge technology. Crafted from Sedna Gold, this watch boasts a unique color that's both warm and striking. Its round shape and sunburst brown finish give it a luxurious feel, while the diamond-set bezel adds a touch of elegance. The 3861 is equipped with a chronograph feature, allowing you to measure elapsed time with precision. At its heart lies the Omega caliber 3861, an updated version of the legendary caliber 861/1861, featuring a co-axial escapement and silicon balance spring for accuracy and reliability. Master Chronometer certified by METAS, this watch has undergone rigorous testing to withstand magnetic fields of up to 15,000 gauss. Its sleek design and exceptional craftsmanship make it a standout in any collection. Whether you're at a formal event or a casual outing, this watch is sure to turn heads.

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Key Features

Sedna Gold case
Manual-winding chronograph movement
Co-axial escapement and silicon balance spring
Master Chronometer certified by METAS
Diamond-set bezel
Water resistance up to 50 meters
42.00 mm diameter and 13.18 mm height

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference

310.55.42.50.13.001

Movement

3861

Movement Features

Small Seconds, Hours, Minutes
Chronograph
Chronometer

Case

Sedna Gold 42mm

Dial Color

Brown

Crystal

Sapphire

Water Resistance

Current Listings

Omega Speedmaster 50th anniversary (2025) - Full Set - $17,000

Omega - 50th anniversary (2025) · $17,000

This Omega Speedmaster 50th anniversary watch is in excellent condition and has only been worn on the steel OEM bracelet. It comes with a full set, including box, booklets, warranty cards, spare links, and an additional Omega NATO strap.

Condition: Excellent
Bracelet condition: Steel OEM bracelet in excellent condition
Strap options: Omega NATO strap in grey and blue textile strap

Posted at

Apr 25, 2026, 10:12 PM

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Omega Speedmaster Professional “Sapphire Sandwich” – Ref. 310.30.42.50.01.002 $6800 plus label

Omega - 310.30.42.50.01.002 · $6,800

This Omega Speedmaster Professional features a 'Sapphire Sandwich' design and comes with its box, warranty cards, and hang tag.

Condition: Pre-owned, noticeable wear on the polished case sides
Bracelet condition: light wear overall

Posted at

Apr 25, 2026, 9:38 PM

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Omega Speedmaster Dark Side Of The Moon (DSOM) - ref. 310.92.44.50.01.001 $12,000 plus shipping label

Omega - 310.92.44.50.01.001 · $12,000

This Omega Speedmaster Dark Side Of The Moon (DSOM) is in excellent condition, with minimal wear. It comes with a full set of accessories and includes a warranty card.

Condition: Like new
Box and papers: true

Posted at

Apr 25, 2026, 9:32 PM

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Rare Vintage Omega Speedmaster Teutonic Ghost Gray Dial Bead Blasted Case Ref 145.0044 - German Market Exclusive

Omega - 145.0044 · $2,795

A unique vintage Omega Speedmaster Teutonic ref 145.0040 designed for the German market in the early 1980s, featuring a bead-blasted case and gray dial.

Condition: Pre-owned, some wear
Case size: 42mm diameter
Bracelet length: up to 7.25 inches
Movement type: Manual wound Omega cal 861

Posted at

Apr 25, 2026, 9:21 PM

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View listing on r/WatchExchange