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 Reduced 3510.50 Excellent Condition + Serialized Hand Tag

Omega - 3510.50 · $2,750

For sale is an Omega Speedmaster Reduced in excellent condition with hardly any signs of wear, it runs great and functions properly.

Condition: Excellent Condition
Payment Methods Accepted: multiple (including crypto) with small fee
Meeting Options: local meetup or shipped

Posted at

Mar 7, 2026, 1:39 PM

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Omega Speedmaster Racing 329.30.44.51.04.001 COMPLETE SET 2024

Omega - 329.30.44.51.04.001 · $6,350

This Omega Speedmaster Racing features a white dial and comes with the complete set, including double boxed packaging and documentation.

Condition: Excellent
Box and papers included: complete set
Warranty card date: 2024
Payment methods accepted: crypto, other payment methods

Posted at

Mar 7, 2026, 1:30 PM

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Omega Speedmaster Professional Moonwatch Hesalite cal. 3861

Omega - Speedmaster Professional Moonwatch Hesalite cal. 3861 · $5,500

This Omega Speedmaster Professional Moonwatch features a hesalite crystal, closed steel caseback, and comfortable quick adjust clasp bracelet. It has the most up-to-date 3861 caliber and retains the original design language and proportions.

Condition: clean piece with minimal wear and no condition notes
Bracelet size limit: 7in
Dimensions: 42mm X 20 lug width X 47h (lug to lug)
Crystal type: hesalite crystal with 13.8cc

Posted at

Mar 7, 2026, 12:48 PM

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Omega "Silver Snoopy" Speedmaster 2025

Omega - 310.32.42.50.02.001 · $15,299

This Omega Speedmaster Silver Snoopy Award is a commemorative edition that pays tribute to Omega's crucial role in the safe return of Apollo 13, featuring a highly detailed caseback animation of Snoopy and a mission-inspired design language.

Condition: Brand new, unworn
Case size: 42mm diameter
Water resistance: 50m depth rating

Posted at

Mar 7, 2026, 12:44 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 with laser-ablated lunar surface details.

Condition: UNWORN
Case material: black ceramic
Case diameter: 44.25mm
Movement: Calibre 1869

Posted at

Mar 6, 2026, 8:25 PM

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OMEGA Speedmaster Calibre 321 "Ed White" Ref. 311.30.40.30.01.001 - ULTIMATE SET! 🔥$16,000🔥

OMEGA - 311.30.40.30.01.001 · $16,000

The OMEGA Speedmaster Calibre 321 Ref. 311.30.40.30.01.001 is a faithful recreation of the reference 105.003, famously worn by astronaut Ed White during America's first spacewalk.

Condition: UNWORN
Movement: Calibre 321 column-wheel chronograph movement
Case size: 39.7mm diameter
Bezel material: black ceramic

Posted at

Mar 6, 2026, 8:15 PM

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