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
- 50
Current Listings
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10/24 Omega Speedmaster White Dial Complete Set *$7,400 + label*
The Omega Speedmaster White Dial is a complete set, including micro-adjust clasp, with no issues and minimal desk rash on the clasp.
- Condition: Pre-owned with minimal desk rash on clasp, runs and functions perfectly
- Year Of Manufacture: 2024
- Clasp Type: micro-adjust
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Omega Speedmaster chocolate Ref 311.30.42.30.13.001
Unique Speedmaster chocolate dial ref 311.30.42.30.13.001, this model was only made in limited numbers and currently discontinued.
- Bracelet length: 6.3 inch
- New bracelet included: true
Omega Speedmaster Professional Apollo 11 L.E. 30th Anniversary
The Omega Speedmaster Professional Moonwatch 30th anniversary Apollo XI is a limited edition of 9,999 pieces, introduced in 1999 to commemorate the 30th anniversary of the Apollo 11 mission. It features a special caseback engraving with an Apollo 11 patch and is similar to the regular 3570.50.00 in all details.
- Condition: Excellent pre-owned condition
- Lug width: 20mm
- Lug-to-lug: 48.2mm
- Case size: 42 mm
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Omega Speedmaster Racing - White Dial - 329.30.44.51.04.001 ( new / 2025 )
A brand new Omega Speedmaster Racing Master Co-Axial in White Dial, featuring a 44.25mm stainless steel case and master co-axial chronometer.
- Condition: Brand new / complete set
- Case size: 44.25mm diameter
- Movement: Master Co-Axial 9900

Omega Speedmaster Moonwatch 3861 - White - 310.30.42.50.04.001 ( excellent )
This Omega Speedmaster Moonwatch Professional features a 42mm stainless steel case and a white dial with sapphire crystal.
- Condition: Excellent
- Case size: 42mm
- Movement: Omega Master Chronometer Movement

Omega Speedmaster Racing - White Dial - 329.30.44.51.04.001 (excellent / 2024)
Up for sale is an Omega Speedmaster Racing Master Co-Axial in White Dial, reference # 329.30.44.51.04.001. It comes with all boxes, papers, booklets, and Omega Warranty Card dated November 2024.
- Condition: Excellent
- Case Size: 44.25mm
- Material: Stainless Steel
- Movement: Master Co-Axial 9900 Chronometer

Omega Speedmaster '57 - 40.5mm Co-Axial - 332.10.41.51.01.001 ( excellent )
This Omega Speedmaster '57 Novelties 2022 is a stainless steel watch with a 40.5mm case and 9906 Master Co-Axial Movement. It comes complete with all boxes, papers, booklets, hang tag and Omega Warranty Card dated September 2022.
- Condition: Excellent Condition
- Case size: 40.5mm
- Movement type: 9906 Master Co-Axial
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Omega Speedmaster Speedy Tuesday - MINT UNWORN $14,500
Up for sale is THE Speedy Tuesday ST1, an UNWORN and MINT example of this hard-to-find watch.
- Condition: Mint Unworn
- Case material: Metal
- Features: Includes box, warranty cards, accessories