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

[US] Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm - 311.30.40.30.01.001 - Full Set

Omega - 311.30.40.30.01.001 · $15,600

A black dial Omega Speedmaster Calibre 321 in 39.7mm is up for sale with a full set of accessories.

Condition: pristine condition
Case Size: 39.7mm diameter

Posted at

May 1, 2026, 7:41 AM

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[US] Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set

Omega - 310.30.42.50.04.001 · $7,950

Up for sale is an Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001, in fantastic condition with minor hairlines on the clasp, case, and bracelet.

Condition: pristine with minor hairlines on clasp, case, and bracelet
Case size: 42mm diameter

Posted at

May 1, 2026, 7:36 AM

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Omega Speedmaster Professional (310.30.42.50.01.002)

Omega - 310.30.42.50.01.002 · $6,800

This Omega Speedmaster Professional features a black dial, sapphire crystal on a steel bracelet and is powered by manual caliber 3861.

Condition: Excellent
Case size: 42mm
Material: Stainless Steel
Crystal type: Sapphire

Posted at

May 1, 2026, 7:28 AM

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Omega Speedmaster Professional “Reverse Panda” | 310.30.42.50.01.004 | 2026 BNIB

Omega - 310.30.42.50.01.004 · $10,500

A stunning Omega Speedmaster Professional known as the "Reverse Panda", this rare model is hard to find and comes with its full set of packaging.

Condition: Brand new in box (BNIB)
Year: 2026
Set included: full set, box, and papers

Posted at

Apr 30, 2026, 10:39 PM

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Omega Speedmaster Triple Calendar Day-Date Ref.3221.30.00 40mm | Great Condition (With Box & Serviced) | $2250

Omega - 3221.30.00 · $2,250

This Omega Speedmaster Triple Calendar Day-Date features a stainless steel case with a thickness of around 15mm and is paired with a sapphire crystal and rated to 100m water resistance. The dial includes chronograph registers, day, date, and month displays, as well as a 24-hour/GMT indication. It's powered by the Caliber 3606 movement.

Condition: Great
Water resistance: 100m
Movement power reserve: 44 hours
Bracelet size range: 18.5-19cm (7.2-7.5 inches)

Posted at

Apr 30, 2026, 10:22 PM

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Omega Speedmaster Professional Moonwatch – Ref. 310.30.42.50.01.001 – Excellent Condition – 2022

Omega - 310.30.42.50.01.001 · $5,450

The Omega Speedmaster Professional Moonwatch is a modern iteration of the legendary Moonwatch with updated movement technology and finishing while staying true to its heritage. It features an iconic Hesalite crystal and manual-wind Master Chronometer movement 3861. The watch is in excellent condition, showing only extremely light signs of wear.

Condition: excellent, minimal hairline scratches
Case size: 42mm
Movement: Cal. 3861 manual-wind Co-Axial Master Chronometer
Crystal: Hesalite

Posted at

Apr 30, 2026, 8:58 PM

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PRICE DROPPP Omega Speedmaster Chronograph Silver Dial – Ref. 324.30.38.50.02.001

Omega - 324.30.38.50.02.001 · $4,548

The Omega Speedmaster 38 offers a refined, modern take on the legendary Speedmaster design, combining classic chronograph heritage with a more versatile and wearable case size.

Case Size: 38mm
Case Material: stainless steel
Bezel: fixed tachymeter

Posted at

Apr 30, 2026, 8:54 PM

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