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 Reduced 3510.50 – Black Dial – Automatic – On Bracelet – $2,850 Shipped

Omega - 3510.50 · $2,850

a Omega Speedmaster Reduced on a bracelet with black dial and automatic movement

Case size: 40mm

Posted at

Mar 1, 2026, 4:32 AM

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Omega 3510.21 Speedmaster Panda ‘Marui’ Japan LE (2,000pcs) – Full Set – $6,300 Shipped

Omega - 3510.21 · $6,300

This Omega Speedmaster Automatic 'Marui' Panda is a Japan-market limited edition featuring a highly collectible white dial with black sub-dials configuration. It has an Omega Cal. 3220 movement, recently serviced, and comes in its original box and papers.

Condition: Clean white dial with strong contrast sub-dials, case remains sharp with honest wear, bezel in good condition with light signs of use, box shows aging consistent with period
Case Size: 39mm x 44mm x 12mm
Lug Width: 18mm
Movement: Omega Cal. 3220 (based on ETA 2890-A2 with Dubois-Dépraz module)

Posted at

Mar 1, 2026, 3:50 AM

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Omega Speedmaster 3513.33 Automatic Date 40

Omega - 3513.33 · $2,700

A beautiful Omega Speedmaster automatic watch, featuring a 40mm case and 100m water resistance.

Case Diameter: 40mm
Water Resistance: 100m
Lug Width: 18mm

Posted at

Mar 1, 2026, 1:33 AM

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Omega 50th Anniversary Silver Snoopy Speedmaster

Omega - 310.32.42.50.02.001 · $15,000

This Omega Speedmaster features a silver dial, blue ceramic bezel, and animated NASA Snoopy caseback complication.

Condition: Excellent pre-owned condition
Case material: Stainless steel
Bracelet: Omega speedmaster metal bracelet
Included items: factory white delivery box, blue speedmaster presentation box, blue outer box, Omega speedmaster travel case, original hang tags, original price stickers, warranty card, Master Chronometer card, pictogram card, manuals

Posted at

Feb 28, 2026, 8:39 PM

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Omega Speedmaster Professional Moonwatch White Dial + EXTRAS. Complete Set w/ Box, Papers and Warranty!

Warranty: still under warranty
Extras: box, papers

Posted at

Feb 28, 2026, 5:06 PM

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Omega Speedmaster 38 | Black Dial Chronograph | 38mm $4500

Omega - 324.30.38.50.01.001 · $4,500

The Omega Speedmaster 38 features the iconic design in a versatile 38mm case, powered by the reliable Omega Caliber 3330 chronograph movement.

Condition: Very good
Case size: 38mm
Water resistance: 100m depth rating

Posted at

Feb 28, 2026, 4:19 PM

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Omega Speedmaster. 39mm. Special Dial.

Omega - Speedmaster · $2,250

This Omega Speedmaster is an automatic watch with a special dial and 39mm case size.

Diameter: 39mm
Movement: Automatic

Posted at

Feb 28, 2026, 11:13 AM

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- Omega Speedmaster Professional 1861 Bracelet

Omega - Speedmaster Professional 1861 · $650

This is a stainless steel bracelet for the Omega Speedmaster Professional 1861 watch, sold in pristine condition with all links and screws included.

Condition: Pristine
Bracelet material: stainless steel

Posted at

Feb 28, 2026, 10:09 AM

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[WTS] Omega Speedmaster Racing 44.25mm New. Reference 329.30.44.51.06.001. Full kit, shipping, inner and outer boxes, hang tag, manuals. 12/27/2025 warranty card. $7750 shipped from Orlando, Florida.

Omega Speedmaster Racing 44.25mm New. Reference 329.30.44.51.06.001. Full kit, shipping, inner and outer boxes, hang tag, manuals. 12/27/2025 warranty card. $7750 shipped from Orlando, Florida.

Omega - 329.30.44.51.06.001 · $7,750

This Omega Speedmaster Racing features a large case size of 44.25mm, making it a statement piece for any watch collector. The watch comes with a full kit, including shipping, inner and outer boxes, hang tag, manuals, and a warranty card valid until 12/27/2025.

Condition: New
Case Size: 44.25mm

Posted at

Feb 27, 2026, 5:32 PM

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