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.

Buy Now on Jomashop

This is an affiliate link

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

[US] Omega Speedmaster Moonwatch Professional Brown Leather Strap + Buckle Clasp - 20mm

Omega - Speedmaster Moonwatch Professional · $270

A Omega Speedmaster Moonwatch Professional available for sale, featuring a brown leather strap and buckle.

Condition: fantastic, with minor hairlines on clasp
Strap width: 20mm
Clasp condition: minor hairlines

Posted at

Apr 30, 2025, 8:49 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Broad Arrow 3556.50.00 – Full Set – $2850 Shipped

Omega - 3556.50.00 · $2,850

The Omega Speedmaster Broad Arrow Olympic Edition is a beautifully finished 42mm automatic chronograph with classic Broad Arrow hands, a date window, and small seconds.

Condition: Excellent - freshly serviced
Case size: 42mm
Movement type: Automatic chronograph
Features: Date window, small seconds, chronograph

Posted at

Apr 29, 2025, 11:17 PM

Active

View listing on r/WatchExchange

2019 Omega Speedmaster Grey Side of the Moon Meteorite - Full set Box and papers - Ref# 311.63.44.51.99.001

Omega - 311.63.44.51.99.001 · $9,498

This Omega Speedmaster Grey Side of the Moon Meteorite features a 44mm ceramic case and Sedna gold details, making it stand out among other speedies.

Condition: Very good condition, small nick on the case
Case diameter: 44mm
Water resistance: 30m

Posted at

Apr 29, 2025, 10:35 PM

Active

View listing on r/WatchExchange

Omega Speedmaster 50th Anniversary Silver Snoopy Award 310.32.42.50.02.001

Omega - 310.32.42.50.02.001 · $14,000

This Omega Speedmaster commemorates the Apollo 13 mission and features a stunning design blending history and horology.

Condition: Excellent pre-owned
Case Size: 42mm diameter
Case Material: Stainless Steel
Strap: Blue coated nylon fabric strap with folding clasp

Posted at

Apr 29, 2025, 10:32 PM

Active

View listing on r/WatchExchange

Omega Speedmaster ref. 3520.50 Automatic Triple Date

Omega - 3520.50 · $2,550

A 39mm automatic Omega Speedmaster with triple date complication, featuring a healthy timegrapher data and functioning chronograph.

Condition: Minimal signs of wear, honest wear throughout
Size: 39mm diameter
Bracelet size: Full-sized
Box papers: No box or papers included

Posted at

Apr 29, 2025, 9:37 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Triple Date 3521.30

Omega - 3521.30 · $1,700

A beautiful white Omega Speedmaster Triple Date with a 3 date complication showing the day, date, and month.

Condition: Very good condition, with some normal wear on the case bezel and bracelet
Size: 39mm diameter
Movement: 1150
Accessories: N/A

Posted at

Apr 29, 2025, 9:34 PM

Active

View listing on r/WatchExchange

Omega Seamaster NTTD on NATO | Omega Speedmaster Moonphase | Tudor Black Bay 58 Burgundy Dial

Omega - 210.92.42.20.01.001 · $6,900

This Omega Speedmaster Moonphase is a high-end watch with a 44.25mm case size, features a moon phase display, and comes with an additional OEM leather strap.

Condition: Very Good
Strap: additional OEM leather strap
Box And Papers: yes
Case Size: 44.25mm

Posted at

Apr 29, 2025, 9:26 PM

Active

View listing on r/WatchExchange

4️⃣4️⃣0️⃣0️⃣Omega Speedmaster Moonwatch

Omega - 311.304.230.01005 · $4,400

2017 Omega Speedmaster Moonwatch with Haselite crystal and Sapphire crystal exhibition back cover, comes with original caseback, bracelet, and warranty card.

Bracelet material: Brushed steel
Crystal type: Haselite

Posted at

Apr 29, 2025, 7:08 PM

Active

View listing on r/WatchExchange

OMEGA Speedmaster Day‑Date 3523.30.00 | Double Boxed + Pictogram Card

OMEGA - 3523.30.00 · $2,450.002

The OMEGA Speedmaster Day-Date 3523.30.00 is a luxury watch featuring a clean crystal and dial, with some minor imperfections on the case and bracelet. The movement is strong but running slightly slow.

Condition: Preowned with small dings and scratches in case and bracelet, movement running slightly slow
Bracelet size: 7.5in (fits larger side)
Movement condition: running slowly, could be regulated by watchmaker
Case/bracelet condition: small dings and scratches, light and easily polishable

Posted at

Apr 29, 2025, 6:50 PM

Active

View listing on WatchUseek