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

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Key1: Cart Edition

Posted at

Feb 26, 2026, 8:36 PM

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Omega - Speedmaster Moonwatch 50th Anniversary Snoopy Nov 2025 Complete Set · $1,508

This Omega Speedmaster Moonwatch is a limited edition 50th anniversary model featuring Snoopy. It comes with the special Snoopy 50th Anniversary box and accessories.

Condition: Mint Condition (handling marks only)
Shipping year: 1968
Payment methods: Wire or Zelle

Posted at

Feb 26, 2026, 7:37 PM

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Omega Speedmaster 324.23.38.50.02.001 38mm Co-Axial

Omega - 324.23.38.50.02.001 · $3,950

A super clean Omega Speedmaster in excellent condition from 2024, featuring a unique gold and green bezel on a green leather strap.

Condition: Excellent
Size: 38mm diameter
Materials: gold and green bezel, green leather strap

Posted at

Feb 26, 2026, 2:59 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 paying tribute to the safe return of Apollo 13, featuring a detailed caseback animation of Snoopy and mission-inspired design language.

Condition: Brand new, unworn
Case size: 42 mm
Diameter: 42 mm case diameter
Movement: Omega Co-Axial Master Chronometer Calibre 3861

Posted at

Feb 26, 2026, 2:51 PM

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Omega Speedmaster Professional Moonwatch Sapphire Sandwich – Full Set – Sept 2025 Warranty – Bracelet + Leather

Omega - Sapphire Sandwich · $6,700

This Omega Speedmaster Professional Moonwatch Sapphire Sandwich features a manual-wind Co-Axial Master Chronometer movement and comes with an OEM stainless steel bracelet, leather strap, inner & outer boxes, warranty card, and booklets.

Condition: Very good condition
Case size: 42mm diameter
Crystal: Sapphire front & display caseback
Movement type: Manual-wind Co-Axial Master Chronometer

Posted at

Feb 26, 2026, 2:00 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 · $5,995

This Omega Speedmaster Racing Co-Axial Master Chronometer Chronograph features a bold orange racing design and the modern Caliber 9900 Master Chronometer movement.

Condition: Preowned, barely worn
Movement: Caliber 9900 Master Chronometer movement - Co-Axial, anti-magnetic, column-wheel chronograph
Strap: Factory black micro-perforated leather with orange rubber lining and Omega folding deployant clasp
Power reserve: approximately 60 hours

Posted at

Feb 26, 2026, 12:19 PM

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Omega Speedmaster First Omega in Space (FOIS) w/ Box & Papers

Omega - 310.30.40.50.06.001 · $6,695

This Omega Speedmaster First Omega in Space (FOIS) is a historic model that marks the first time an Omega watch went to space.

Condition: Very good condition, some light signs of wear
Box and papers: true
Original owner: true

Posted at

Feb 26, 2026, 11:58 AM

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2022 Omega Speedmaster Moonwatch Sapphire 42mm 310.30.42.50.01.002 Mint Complete

Omega - 310.30.42.50.01.002 · $6,195

This 2022 Omega Speedmaster Moonwatch Sapphire 42mm is a first watch worn on the moon, featuring photos and a video on the seller's website.

Condition: Minty fresh
Case size: 42mm
Year: 2022
Contents: watch,inner & outer boxes,warranty card,pictogram,master chronometer,instruction booklet,black travel case,hang tag,cleaning cloth,Moonwatch Booklet

Posted at

Apr 7, 2025, 2:59 PM

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Omega Speedmaster Chronograph - Blue - Stainless Steel - 38mm - Mint

Omega - 324.30.38.50.03.002 · $3,695

This Omega Speedmaster Chronograph features a 38mm stainless steel case, blue dial, and automatic movement.

Condition: Pre-Owned - Mint
Case size: 38mm diameter
Bracelet type: Stainless Steel
Dial color: Blue

Posted at

Apr 5, 2025, 6:13 PM

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