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 Professional Moonwatch Full Steel 145.022-69 Ghost Bezel Yellow Patina Step Dial 1969 (Serviced) 🔥

Omega - 145.022-69 · $5,250

This Omega Speedmaster Moonwatch presents beautifully in full steel, showcasing a strong and sharp case with thick lugs that retain their original shape. The tritium lume remains reactive under UV light, confirming its authenticity.

Case size: 42mm
Year: 1969
Bezel condition: ghost tone

Posted at

Feb 27, 2026, 12:41 PM

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Omega reverse panda Speedmaster Full Set $10,300 including CONUS shipping 310.30.42.50.01.004

Omega - 310.30.42.50.01.004 · $10,300

For sale is the new Speedmaster reverse panda, which comes with full links, all boxes, and warranty card.

Condition: excellent
Water Resistance: 50m depth rating

Posted at

Feb 27, 2026, 12:08 PM

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2021 Omega 42mm 310.30.42.50.01.001 Speedmaster Moonwatch - $5,900

Omega - 310.30.42.50.01.001 · $5,900

The watch is described as a 2021 Omega Speedmaster Moonwatch Chronograph with a stainless steel black dial and Hesalite crystal.

Condition: Excellent overall condition
Box And Papers: Yes
Warranty Period: 5 years
Bracelet Size: 8.25inch wrist (Full Links)

Posted at

Feb 27, 2026, 11:58 AM

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Omega Speedmaster Silver Snoopy 310.32.42.50.02.001 Strap Bracelet 2025 LNIB

Omega - 310.32.42.50.02.001 · $14,900

For sale is a like new Omega Speedmaster Silver Snoopy, complete with unworn blue rubber strap, all 3 cards, and original Omega bracelet.

Condition: Like New in Box (LNIB)
Strap: blue rubber strap
Bracelet: original Omega bracelet
Warranty Card Date: 2/2025

Posted at

Feb 27, 2026, 11:45 AM

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Omega Speedmaster. Moonphase. Gorgeous Dial. Clean.

Omega · $4,895

A crisp and clean Omega Speedmaster with a gorgeous blue dial and moonphase functionality. The watch runs strong and has good legibility.

Condition: Clean
Diameter: 42mm

Posted at

Feb 27, 2026, 11:25 AM

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Omega Speedmaster Split‑Seconds Chronograph 35405000 dial – Box / Papers

Omega - 35405000

Dial condition: split-second chronograph dial

Posted at

Feb 27, 2026, 11:14 AM

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Omega Speedmaster Pro 2024 | Excellent Condition (Full Set Box, Papers, Cards, etc) | $7500

Omega - 310.30.42.50.01.002 · $7,500

This is an Omega Speedmaster Moonwatch Pro from 2024, available in excellent condition with a complete set of accessories and still under factory warranty.

Condition: Excellent Condition (Full Set)
Glass type: Sapphire Glass
Caseback: Open Caseback

Posted at

Feb 26, 2026, 10:46 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 is a 44.25mm masterpiece crafted from black ceramic, commemorating the 50th anniversary of the Apollo 8 mission.

Condition: [UNWORN]
Material: black ceramic
Case diameter: 44.25mm
Movement: Calibre 1869

Posted at

Feb 26, 2026, 9:21 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 'Ed White' 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
Case material: stainless steel
Diameter: 39.7mm

Posted at

Feb 26, 2026, 9:09 PM

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