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
- 50
Current Listings

Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (excellent)
This Omega Speedmaster Moonwatch Professional Sapphire features a 42mm stainless steel case and is powered by the Omega Master Chronometer movement.
- Condition: Excellent
- Case size: 42mm diameter
- Movement: Omega Master Chronometer Movement
Omega Speedmaster Day-Date Moonphase White Dial Chronograph 18K/SS 3730.20
This Omega Speedmaster Day-Date Moonphase features a white dial and chronograph function, housed in a stainless steel case with an 18K gold accent.
- Condition: 95%
- Size: 39mm
- Case material: Stainless Steel / 18K gold accent
- Movement type: Mechanical Automatic

NIB Omega SPEEDMASTER MOONWATCH APOLLO 8 DARK SIDE OF THE MOON FULL SET
2019 Omega Speedmaster Moonwatch Chronograph Dark Side Of The Moon Apollo 8, black ceramic case on leather strap with ceramic tang buckle.
- Condition: New Old Stock (NIB)
- Case material: Black Ceramic
- Strap material: Leather
- Buckle material: Ceramic

2023 Omega Speedmaster �SNOOPY� 50th Anniversary 310.32.42.50.02.001 BOXES/PAPERS!
2023 Omega Speedmaster �SNOOPY� 50th Anniversary edition timepiece with stainless steel case, coated nylon fabric band, and manual movement.
- Condition: Excellent, pre-owned with minor surface wear on case and strap
- Movement Type: Manual
- Case Diameter: 42mm
- Water Resistance: 50m

Omega Speedmaster Date 1957 Limited Edition �2,009� BOXES/PAPERS/SERVICED!
This Limited Edition Speedmaster was produced in just 2,009 pieces specifically for the Japanese market. It comes with outer white box, missing inner red box, manuals, hangtag, service paperwork/parts, and all 3 cards.
- Condition: pre-owned, nice condition with typical cosmetic wear on the case and bracelet
- Bezel Type: Fixed with Tachymetric Scale
- Band Material: Stainless Steel
- Case Diameter: 40mm

NEW 2025 Omega Speedmaster Moonwatch Professional Chronograph 42mm White Dial
This is a new 2025 Omega Speedmaster Moonwatch Professional Chronograph with a 42mm stainless steel case and a white dial.
- Condition: Brand New/Unworn
- Box And Papers: Yes
- Warranty Years: 5
OMEGA Speedmaster Dark Side of the Moon 311.92.44.51.01.005 44mm w/BOX & PAPERS
The OMEGA Speedmaster Dark Side of the Moon is a 44mm watch featuring a black ceramic case, dial, and bezel, with a sapphire crystal and exhibition caseback. It has a chronograph complication and date display at 6:00.
- Condition: Good preowned condition
- Case size: 44.25 mm
- Movement: 9300 Caliber Movement

2023 Omega Speedmaster Professional Moonwatch Sapphire 310.30.42.50.01.002
A personal Omega Speedmaster Professional Moonwatch with Sapphire crystal in excellent condition, worn only a few times.
- Condition: Excellent
- Year Purchased: 2024
- Warranty Remaining Years: 3
- Included Accessories: Outer/Inner Box,Warranty Cards,Booklets/Manual,Links
Omega Tokyo Olympics 'Yellow Ring' Speedmaster 522.20.42.30.01.001
This Omega Speedmaster Tokyo Olympics 'Yellow Ring' features a unique design and is in good condition, with watch and box included.
- Condition: Good condition all around
- Shipping: Free shipping within the US, possible options for overseas shipping