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

Omega Speedmaster Reduced 175.00.33 Gold Dial 39mm Automatic $2,625

Omega - 175.00.33 · $2,625

Selling an Omega Speedmaster Reduced 39mm Auto Gold Dial, watch only with aftermarket bracelet and additional strap.

Case size: 39mm diameter
Bracelet length: 16.5cm
Strap included: true

Posted at

Mar 16, 2026, 3:19 AM

Active

View listing on r/WatchExchange

2025 Omega Speedmaster Meteorite Moonphase Complete set + Serialized AD Sales Receipt

Omega - 304.30.43.52.01.001 · $85,000

The Omega Speedmaster Moonphase Meteorite features a unique dial made from genuine meteorite, set into a beautifully finished piece of cosmic history on your wrist.

Condition: Excellent pre-owned condition
Year: 2025
Case size: 43mm diameter
Dial material: meteorite

Posted at

Mar 16, 2026, 12:13 AM

Active

View listing on r/WatchExchange

Omega Speedmaster TV Dial

Omega - Speedmaster TV Dial · $4,000

A hard-to-find Omega Speedmaster with a unique 'TV dial' design from the late 1970s. It's currently running and keeping time but requires servicing on its pushers.

Condition: Pre-owned, unpolished with pusher issues requiring service
Pusher service needed: true
Original ownership duration: 40 years

Posted at

Mar 15, 2026, 9:13 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Moonwatch (Hesalite)

Omega - 311.30.42.30.01.005 · $5,200

This Omega Speedmaster Professional Moonwatch Hesalite is a pre-3861 Speedmaster powered by manual-wind Caliber 1861, continuing the lineage of historic Moonwatch models.

Condition: Very Good
Year: 2020
Power source: Manual-Wind Caliber 1861
Warranty period: 2 years

Posted at

Mar 15, 2026, 7:37 PM

Active

View listing on r/WatchExchange

2024 OMEGA SPEEDMASTER WHITE DIAL 310.30.42.50.04.001 $7599

OMEGA - 310.30.42.50.04.001 · $7,599

2024 OMEGA SPEEDMASTER WHITE DIAL FOR SALE Additional Details:

Year: 2024

Posted at

Mar 15, 2026, 4:38 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Hesalite I 310.30.42.50.01.001 | Dated 03/2023 | $5,399

Omega - 310.30.42.50.01.001 · $5,399

This Omega Speedmaster Professional Hesalite I is a manual wind, mechanical watch with a stainless steel case and black dial, featuring hesalite crystal.

Condition: Preowned, Very Good Condition
Case Material: Stainless Steel
Band Material: Stainless Steel
Movement Type: Manual Wind, Mechanical

Posted at

Mar 15, 2026, 3:45 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Japan Edition 3211.50.00

Omega - 3211.50.00 · $2,599

This Omega Speedmaster Japan Edition is in great pre-owned condition with limited signs of wear throughout.

Condition: pre-owned with limited signs of wear
Case Size: 40mm diameter

Posted at

Mar 15, 2026, 1:58 PM

Active

View listing on r/WatchExchange

Omega Speedmaster GSOTM Meterorite, Full Set w/ Extra Strap

Omega - 311.63.44.51.99.001 · $12,000

A mint condition Omega Speedmaster Grey Side of the Moon Meteorite, a limited edition timepiece featuring a solid Sedna gold bezel and ceramic case, available with an original gray alligator leather strap as well as an additional brand new black alligator leather strap.

Condition: Excellent
Case size: 44.25mm
Movement: Automatic
Case material: Ceramic

Posted at

Mar 15, 2026, 1:18 PM

Active

View listing on r/WatchExchange