Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

Reference 310.55.42.50.51.001

Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold is a stunning blend of luxury and functionality, with its Sedna gold construction and intricate chronograph features. The watch's sheer elegance is undeniable, with a black sunburst finish contrasting beautifully with gem-set indexes and ruby accents. Certified as a Master Chronometer by METAS, the Omega caliber 3861 movement is an engineering marvel, resistant to magnetic fields up to 15,000 gauss. With small seconds, hours, and minutes hands, the chronograph functionality offers precision timing. The watch's durability is also noteworthy, with sapphire glass adding scratch resistance. The Sedna gold bracelet ensures a secure fit, while its adjustability makes it comfortable for wearers of all wrist sizes. This timepiece is not just a luxury item but a conversation starter, status symbol, and piece of horological history.

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Key Features

Omega caliber 3861 movement with Co-Axial escapement and silicon balance spring
Sedna gold construction with gem-set indexes and ruby accents
50m water resistance with sapphire glass scratch resistance
Chronograph functionality with small seconds, hours, and minutes hands
Adjustable Sedna gold bracelet for secure fit on all wrist sizes

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

Reference

310.55.42.50.51.001

Movement

3861

Movement Features

Small Seconds, Hours, Minutes
Chronograph
Chronometer

Case

Sedna Gold 42mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

Current Listings

OMEGA SPEEDMASTER PROFESSIONAL MOONSWATCH 35735000 *FULL SET* (B&P) [WTS] $5750

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Full set, Speedmaster Professional Moonwatch in a box (B&P)

Set: full set

Posted at

Jan 25, 2026, 9:40 PM

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Omega Speedmaster Broad Arrow 321.10.42.50.01.001 2019 $3,999 [USA]

Omega - 321.10.42.50.01.001 · $3,999

This Omega Speedmaster Broad Arrow is from 2019 with a crisp case and running perfectly. It comes on a massive bracelet that can fit most wrists.

Condition: Incredible-condition
Dimensions: 42mm diameter
Year: 2019

Posted at

Jan 25, 2026, 7:31 PM

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2007 Omega Speedmaster Date 3210.50 - $2,299

Omega - 3210.50 · $2,299

An Omega Speedmaster Date Chronograph ref. 3210.50 from 2007 in good overall condition, featuring a black dial and stainless steel bracelet.

Condition: Good overall condition, signs of wear
Case size: 40mm diameter
Serial number: 81.6M (circa 2007)
Dial color: Black

Posted at

Jan 25, 2026, 7:16 PM

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Omega - Silver Snoopy Award Speedmaster · $15,000

This is an unworn Omega Silver Snoopy Award Speedmaster, a limited edition model to celebrate the 50th anniversary of the Snoopy award.

Condition: Unworn
Year: 2023
Anniversary: 50th

Posted at

Jan 25, 2026, 7:09 PM

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Omega Speedmaster Professional Snoopy 50th Anniversary Ref: 310.32.42.50.02.001 BNIB

Omega - 310.32.42.50.02.001 · $12,700

This Omega Speedmaster Snoopy 50th Anniversary watch is a brand new, unworn model with a complete package and extra travel box.

Condition: Brand new, never worn (BNIB)
Case Size: 40mm diameter
Water Resistance: unknown
Warranty: valid until end of 2025

Posted at

Jan 25, 2026, 6:07 PM

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Omega Speedmaster sapphire Sandwich 2021, comes as full set (-2 links) $5,999 shipped

Omega - 310.30.42.50.01.002 · $5,999

Up for sale is a Omega Speedmaster sapphire sandwich from 2021, comes as full set with original inner/outer box and papers.

Condition: Excellent
Year: 2021
Case Size: 42mm
Material: Stainless Steel

Posted at

Jan 25, 2026, 3:52 PM

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Omega Speedmaster "First Omega in Space" (FOIS) 2024 ed. w/ Box & Papers

Omega - 310.30.40.50.06.001 · $7,100

This Omega Speedmaster "First Omega in Space" (FOIS) is the 2024 edition, featuring a ref. 310.30.40.50.06.001 model number.

Condition: very good
Year purchased: 2025
Box and papers included: true

Posted at

Jan 25, 2026, 2:48 PM

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Omega Speedmaster Professional Full Kit w Extras!

Omega - 3861 Hesalite · $5,500

This Omega Speedmaster Professional Moonwatch features a Cal. 3861 Master Chronometer movement and comes with upgrades such as a sapphire display caseback, making it a true Hesalite sandwich.

Condition: Pre-owned with normal wear/use consistent with daily rotation
Caliber: Cal. 3861 (Master Chronometer)
Bracelet adjustment type: tool-less sliding clasp
Caseback material front: Hesalite

Posted at

Jan 25, 2026, 1:30 PM

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Omega "Michael Schumacher" Speedmaster Limited to only 5555.

Omega - 3529.50.00 · $2,200

This limited edition Omega Speedmaster 'Michael Schumacher' chronograph features a stainless steel case, black racing dial, day/date display, tachymetre bezel, and is powered by an automatic movement. Produced in 2003, it measures 39mm in size.

Condition: neat and clean with some marks on the bezel
Case size: 39mm diameter
Bracelet size limit: 7.5 inch wrist
Water resistance: unknown

Posted at

Jan 25, 2026, 8:23 AM

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