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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Box: included

Posted at

Apr 24, 2026, 4:56 PM

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Additional details for Omega Speedmaster Professional rubber straps with curved ends and stainless steel deployant clasp. Designed to fit 20mm lugs.

Condition: Very Good
Material: rubber
Clasp Type: stainless steel deployant clasp
Lugs Size: 20mm

Posted at

Apr 24, 2026, 3:27 PM

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2026 LNIB OMEGA Speedmaster Moonwatch Professional "Reverse Panda" 310.30.42.50.01.004 - Full Set

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The Omega Speedmaster Moonwatch Professional 'Reverse Panda' is a new addition to the permanent Moonwatch collection, featuring a glossy polished black lacquered step dial with white varnished and lacquered sub-dials.

Condition: Pristine pre-owned condition, virtually like new
Case size: 42mm diameter
Movement: Manual-Winding Co-Axial Master Chronometer Calibre 3861 (METAS certified)
Power reserve: ~50 hours

Posted at

Apr 24, 2026, 2:47 PM

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This Omega Speedmaster Day Date features a beautiful blue dial and is in excellent condition with minimal signs of wear.

Condition: Excellent
Payment Methods Accepted: pretty much every payment method, including crypto
Meetup Location: southwest FL
Available Trades: Tudor, Cartier, Rolex, Omega, Breitling, AP

Posted at

Apr 24, 2026, 1:25 PM

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Omega Speedmaster Racing 326.30.40.50.03.001

Omega - 326.30.40.50.03.001 · $2,450

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Condition: great condition with some light wear
Payment Methods Accepted: pretty much every payment method including crypto
Local Meet Available: yes

Posted at

Apr 24, 2026, 1:20 PM

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Omega Speedmaster Date 38.5mm 3513.54

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For sale is an Omega Speedmaster Date 38.5mm reference number 3513.54, in good condition, from 1998.

Condition: good with some wear and small marks
Year of production: 1998
Case size: 38.5mm

Posted at

Apr 24, 2026, 1:15 PM

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Omega Speedmaster Reduced 3510.50

Omega - 3510.50 · $2,475

For sale is an Omega Speedmaster Reduced 3510.50 in great condition, with some minor wear and fading on the bezel.

Condition: Great condition with some light wear and fading on the bezel
Payment Methods Accepted: Various payment methods including crypto with a small fee, excluding PayPal
Local Pickup Available: Yes, located in southwest FL
Trading Possible: Yes, only with brands Tudor, Cartier, Rolex, Omega, Breitling, AP

Posted at

Apr 24, 2026, 1:00 PM

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2026 Omega Speedmaster Professional White Dial 310.32.42.50.04.002 Full Set $7,300

Omega - 310.32.42.50.04.002 · $7,300

A modern Omega Speedmaster Professional with a lacquered white dial, powered by the Co-Axial Master Chronometer Calibre 3861, featuring a clean and high-contrast look while maintaining the iconic Speedmaster design.

Condition: Like new
Case size: 42mm diameter
Case material: Stainless steel
Movement: Manual wind (Omega Calibre 3861 Master Chronometer)

Posted at

Apr 24, 2026, 12:48 PM

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