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 Moonwatch Professional Moonshine Gold 42mm Complete Set 310.62.42.50.99.001

Omega - 310.62.42.50.99.001 · $23,895

A work of art from every angle, the Omega Speedmaster Moonwatch is anti-magnetic with a co-axial escapement, making it perfect for daily wear.

Condition: Excellent
Case size: 42mm diameter
Movement caliber: Omega 3861
Power reserve: 50 hours

Posted at

Oct 16, 2025, 8:32 AM

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Omega Speedmaster Date Grey 40mm Automatic 323.30.40.40.06.001

Omega - 323.30.40.40.06.001 · $2,750

A beautiful Omega Speedmaster in a 40mm size, perfect for most wrists.

Condition: Very good
Size: 40mm diameter
Case condition: Minimal signs of wear

Posted at

Oct 15, 2025, 6:10 PM

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Omega Speedmaster Broad Arrow 3594.50 (EU seller)

Omega - 3594.50 · $4,000

This Omega Speedmaster Broad Arrow is a unique design with a 42mm case, featuring calibre 1861 and accompanied by its original box and papers from 2004.

Condition: Excellent condition, 20-year-old
Size: 42mm diameter
Bracelet material: Original steel

Posted at

Oct 15, 2025, 12:11 PM

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Omega Speedmaster Professional Moonwatch 18k Sedna Gold Black Dial 310.60.42.50.01.001

Omega - 310.60.42.50.01.001 · $28,295

A stunning Omega Speedmaster Professional Moonwatch with 18k Sedna gold and a deep black dial. This watch presents in excellent condition and comes with its outer box, inner box, booklet, and warranty card.

Condition: Excellent, little to no signs of wear
Movement: Mechanical (Manual) Movement Caliber: Omega 3861
Case Size: 42mm diameter
Thickness: 13.18mm

Posted at

Oct 15, 2025, 8:42 AM

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[US] Omega Speedmaster Chronoscope - White Panda Dial - 43mm - 329.30.43.51.02.002

Omega - 329.30.43.51.02.002 · $5,400

A 43mm Omega Speedmaster Chronoscope with a White Panda Dial, in excellent working order and accompanied by original accessories.

Condition: Fantastic with minor hairlines
Diameter: 43mm

Posted at

Oct 15, 2025, 8:12 AM

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OMEGA Speedmaster Moonwatch White Dial 2025 Full Set 310.30.42.50.04.001

OMEGA - 310.30.42.50.04.001 · $7,000

A white dial Omega Speedmaster Moonwatch with a stainless steel case, sapphire crystal, and water resistance of 5ATM (50 meters), powered by the in-house caliber 3861.

Case diameter: 42mm
Case thickness: 13.18mm
Water resistance: 50m depth rating

Posted at

Oct 14, 2025, 5:39 PM

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2023 Omega Speedmaster Moonwatch Professional | 310.30.42.50.01.002 | Complete | Sapphire Sandwich | Speedy

Omega - 310.30.42.50.01.002 · $6,550

The Omega Speedmaster Moonwatch Professional 'Sapphire Sandwich' is a gorgeous watch highlighted by the two sapphire crystals, making it perfect for daily wear. It's comfortable, simple, and practical.

Condition: Excellent
Box: Complete set
Papers: Full set of documents
Links: Full links present

Posted at

Oct 14, 2025, 2:33 PM

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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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