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 Racing Chronograph Silver Dial Watch 326.30.40.50.02.001 Complete Set

Omega - 326.30.40.50.02.001 · $5,895

The Omega Speedmaster Racing features a silver white dial, stainless steel case and bracelet, and chronograph movement, making it a striking and fresh take on the classic Moonwatch profile.

Condition: Excellent
Case Size: 40mm diameter
Movement Type: chronograph

Posted at

Jan 21, 2026, 3:06 PM

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Omega Speedmaster Black Fabric Strap

Omega - CWZ014117 · $240

A black fabric strap for the Omega Speedmaster Pro watch, available for sale with free shipping.

Condition: like new, never worn
Width: 20/16mm

Posted at

Jan 21, 2026, 10:32 AM

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Omega Speedmaster Professional Moonwatch "Sapphire Sandwich" 310.30.42.50.01.002 Brand New Fully Stickered / Triple Boxed

Omega - 310.30.42.50.01.002 · $8,199

The Omega Speedmaster Professional Moonwatch 'Sapphire Sandwich' is a black dial chronograph with sapphire crystal front and back, featuring the iconic tachymeter bezel and trio of subdials. The exhibition caseback shows off the Master Chronometer certified caliber 3861 movement. This watch maintains the asymmetrical lug design and twisted lugs that protect the chronograph pushers.

Condition: Brand new - fully stickered
Case size: 42mm
Bracelet type: Five-link stainless steel

Posted at

Jan 20, 2026, 8:26 PM

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2023 Steel Bracelet Omega Speedmaster 38MM 324.30.38.50.06.001 Box and Papers

Omega - 324.30.38.50.06.001 · $4,200

This is a 2023 Steel Speedmaster 38MM Grey dial watch with features such as chronometer, date at 6 O'clock, and water resistance up to 100 Meters.

Condition: Excellent
Movement: Omega 3330
Power Reserve: 52 hours
Crystal: Scratch resistant Sapphire Crystal

Posted at

Jan 20, 2026, 11:21 AM

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Omega Speedmaster Automatic Chronograph Date — Ref. 3211.30.00 | Cal. 1164 COSC — $1,999 + Shipping

Omega - 3211.30.00 · $1,999

This listing appears to be for an Omega Speedmaster Automatic Chronograph Date with reference number 3211.30.00, featuring Calibre 1164 and COSC certification.

Posted at

Jan 20, 2026, 8:34 AM

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