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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This Omega Speedmaster Moonphase is a two-tone model featuring steel and Sedna gold, housed in a 44mm case.

Condition: Very good condition with some normal wear
Movement: Cal 9904
Size: 44mm diameter

Posted at

Apr 28, 2026, 9:00 PM

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Omega. Speedmaster. Reverse Panda. Complete Set. $2099 Only

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This Omega Speedmaster is a Reverse Panda model, complete with its original set including warranty, tag, inner and outer box, and two booklets.

Condition: 7.75/10 with wear around bezel
Bracelet size: 20 links
Warranty status: Complete
Box condition: Inner and Outer Box, 2 booklets

Posted at

Apr 28, 2026, 8:36 PM

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(Omega) Speedmaster Date 3511.50 Full Set $2,099

Omega - 3511.50 · $2,099

For sale is an Omega Speedmaster Date, reference 3511.50, a reduced variant made for the Japanese market. This automatic watch features a 39mm case and 18mm lugs.

Condition: Excellent external condition, running well internally
Case size: 39mm diameter
Lug-to-lug length: 45mm
Thickness: 13.8mm

Posted at

Apr 28, 2026, 8:18 PM

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Omega Speedmaster Reduced - Mother of Pearl - White Dial - Factory Strap

Omega - Speedmaster Reduced · $2,350

A rare and unique Omega Speedmaster reduced model with a 39mm case, featuring a stunning Mother of Pearl dial.

Condition: Good condition for the age
Case size: 39mm
Strap type: Factory Omega leather strap

Posted at

Apr 28, 2026, 5:37 PM

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Omega Speedmaster Racing - 32630405001002

Omega - 32630405001002 · $2,999

This Omega Speedmaster Racing is in good condition, having been worn a handful of times. It features desk diving scratches on the clasp.

Condition: Pre-owned, minor scratches
Scratches location: Clasp
Shipping discussion possible: true

Posted at

Apr 28, 2026, 5:06 PM

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Omega Speedmaster Moonwatch Hesalite 1861 3570.50.00 ( excellent / 2007 / box and papers )

Omega - 3570.50.00 · $4,750

This Omega Speedmaster Moonwatch Professional Chronograph 1861 is a 42mm stainless steel watch with Hesalite crystal, reference # 3570.50.00.

Condition: Excellent condition
Case size: 42mm diameter
Movement: 1861 Omega Calibre

Posted at

Apr 28, 2026, 1:36 PM

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Omega Speedmaster Sapphire New 2026, $7500

Omega - 310.30.42.50.01.002 · $7,500

This listing is for a brand new Omega Speedmaster Sapphire, featuring a reference number of 310.30.42.50.01.002 and coming with its original box and warranty.

Condition: Brand New Condition
Shipping Cost: $150 for USA
Payment Methods: Wire or Credit Card (+4.9% & 4 days clearance)
Warranty Year: 2026

Posted at

Apr 28, 2026, 10:35 AM

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