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.

Buy Now on Jomashop

This is an affiliate link

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

[US] Omega Speedmaster Silver Snoopy - 50th Anniversary - 310.32.42.50.02.001 - Full Set - BRAND NEW

Omega - 310.32.42.50.02.001 · $14,750

This Omega Speedmaster Silver Snoopy is a limited edition 50th anniversary watch that comes in its full set with box, manuals, and other accessories.

Condition: Brand new, pristine and unworn
Case size: 42mm diameter
Water resistance: 30m water resistant

Posted at

Dec 3, 2025, 8:38 AM

Active

View listing on r/WatchExchange

[US] Omega Speedmaster Chronoscope - White Panda Dial - 43mm - 329.30.43.51.02.002

Omega - 329.30.43.51.02.002 · $5,175

A white panda dial Omega Speedmaster Chronoscope in 43mm size, with minor hairlines on the clasp and bracelet.

Condition: Fantastic
Diameter: 43mm

Posted at

Dec 3, 2025, 8:26 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Moonwatch - 311.30.42.30.01.005 - Big Box - Great Condition

Omega - 311.30.42.30.01.005 · $4,750

A highly sought after Omega Speedmaster Professional Moonwatch 'Big Box' collector's set purchased in 2017, showing great pre-owned condition.

Condition: great pre-owned condition, some normal wear on the stainless steel strap and minor marks on hesalite crystal
Case diameter: 42mm
Band material: stainless steel

Posted at

Dec 2, 2025, 10:48 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Moonwatch – Ref. 145.0022 / 345.0022 – Hesalite – Circa 2005 – Very Clean

Omega - 145.0022 / 345.0022 · $4,000

This is a full-size 42mm manual-wind Moonwatch in very clean pre-owned condition with Hesalite crystal and strong movement.

Condition: Very clean pre-owned condition
Movement Type: Manual wind - Caliber 1861
Crystal Material: Hesalite
Bracelet Type: Stainless steel

Posted at

Dec 2, 2025, 6:16 PM

Active

View listing on r/WatchExchange

OMEGA Speedmaster Hesalite 3861 May 2023 - $5600

OMEGA - 3861 · $5,600

This Omega Speedmaster Professional, also known as The Moonwatch, features a Hesalite crystal and is from May 2023. It comes with its original box, papers, and manual in excellent condition.

Condition: Excellent
Year Of Manufacture: 2023
Crystal Material: Hesalite
Bracelet Adjustment: micro adjust

Posted at

Dec 2, 2025, 2:58 PM

Active

View listing on r/WatchExchange

November 2025 Omega Speedmaster Sapphire Complete Set $7,200 + label

Omega - 310.30.42.50.01.002 · $7,200

The watch is a November 2025 Omega Speedmaster Sapphire Complete Set with micro-adjust clasp, featuring all cards included, travel case, and Speedmaster literature.

Condition: Brand new, fully stickered and unworn
Year: November 2025
Micro-adjust clasp: available
State: Louisiana

Posted at

Dec 2, 2025, 11:11 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional “Tokyo 2020 Yellow” – Ref. 522.20.42.30.01.001 – Complete Set – $6500

Omega - 522.20.42.30.01.001 · $6,500

This Omega Speedmaster Professional features a 42mm stainless steel case with yellow gold accents and black dial with gold subdials, powered by the classic hand-wound Caliber 1861 movement. It comes with various accessories as part of its complete set.

Condition: Very good pre-owned
Case diameter: 42mm
Bracelet type: stainless steel
Movement: hand-wound Caliber 1861

Posted at

Dec 1, 2025, 8:50 PM

Active

View listing on r/WatchExchange