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 Spiralwinder Ceramic Bezel for 3861

Omega - 3861 · $150

This is a Speedmaster Spiralwinder ceramic bezel insert designed for the 3861 Speedmaster Professional cases. It features a deep black ceramic with crisp white numerals and a DON90 tachymeter layout.

Compatible Reference: 3861
Bezel Material: ceramic
Tachymeter Layout: DON90 (Dot Over 90)

Posted at

Dec 14, 2025, 10:14 PM

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Omega Omega Speedmaster 38 Co-axial Chronograph Ref. 324.32.38.50.02.001 (2024) - Pre-Owned Very Good Condition w/ Box & Papers

Omega - 324.32.38.50.02.001 · $3,750

This Omega Speedmaster 38 Coaxial Chronograph features an elegant silver dial, chronograph functionality, and automatic movement in a stainless steel case with 10 ATM water resistance and 38mm diameter.

Condition: Pre-Owned very good condition
Case material: stainless steel
Diameter: 38mm
Movement: automatic Calibre 3330

Posted at

Dec 14, 2025, 10:07 PM

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Omega Speedmaster Professional Moonwatch Tropical Brown Dial Heavy Patina Blue Insert 1969 (Box/Serviced) 🟤

Omega - 145.022-69 · $15,150

This rare and fully original Omega Speedmaster Moonwatch features a stunning tropical brown dial with deep yellow patina across all indices and matching hands. The original blue bezel has aged attractively, taking on a rich blue tone that pairs perfectly with the tropical dial.

Condition: Very rare and fully original, beautiful condition
Size: 42mm diameter
Year: 1969
Case Back Type: flat case back

Posted at

Dec 14, 2025, 7:08 PM

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Omega Speedmaster Moonphase 2024 Box and Papers with AD Receipt

Omega - Moonphase · $10,400

Year: 2024
Box Papers: yes

Posted at

Dec 14, 2025, 5:06 PM

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Omega Speedmaster FOIS, Numbered Edition, Very Clean (2017), $4200 shipped

Omega - 311.32.40.30.01.001 · $4,200

This Omega Speedmaster FOIS is a numbered edition from 2017 with a very clean and smooth action.

Condition: Very good
Caliber: Omega 1861
Power reserve: 48 hours
Case dimensions: [object Object]

Posted at

Dec 14, 2025, 3:05 PM

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Omega Dark Side of the Moon Speedmaster 311.92.44.30.01.001

Omega - 311.92.44.30.01.001 · $8,550

The Omega Speedmaster Dark Side of the Moon features a black zirconium oxide ceramic case, bezel, and crystal, with a black dial and applied indices.

Condition: Great overall with light signs of use on the strap
Case size: 44.25mm diameter
Movement: Omega Co-Axial Calibre 9300 automatic chronograph

Posted at

Dec 14, 2025, 2:45 PM

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Omega Speedmaster Professional Moonwatch model 145.022 78 ST fully serviced.

This is a description of the Omega Speedmaster Professional Moonwatch model 145.022 78 ST that has been fully serviced.

Posted at

Dec 14, 2025, 11:36 AM

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2022 Omega Speedmaster Chronoscope Co-Axial Master Chronometer 329.30.43.51.02.001

Omega - 329.30.43.51.02.001 · $5,500

A 2022 Omega Speedmaster Chronoscope Co-Axial Master Chronometer in good working order and excellent cosmetic condition. It comes with box and papers dated 2022.

Condition: Great condition overall
Case size: 43mm diameter
Movement: Co-Axial Master Chronometer
Box and papers included: yes

Posted at

Dec 14, 2025, 9:35 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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