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
![[WTS] Omega Speedmaster Reduced 3510.50](https://preview.redd.it/lnykkhpx56xg1.jpg?width=640&crop=smart&auto=webp&s=aa5e42a65deb97ee6a9eef0da9505d91a9065bed)
Omega Speedmaster Reduced 3510.50
For sale is an Omega Speedmaster Reduced 3510.50 in great condition, with some minor wear and fading on the bezel.
- Condition: Great condition with some light wear and fading on the bezel
- Payment Methods Accepted: Various payment methods including crypto with a small fee, excluding PayPal
- Local Pickup Available: Yes, located in southwest FL
- Trading Possible: Yes, only with brands Tudor, Cartier, Rolex, Omega, Breitling, AP
![[WTS] 2026 Omega Speedmaster Professional White Dial 310.32.42.50.04.002 Full Set $7,300](https://preview.redd.it/krybhbjl36xg1.jpg?width=640&crop=smart&auto=webp&s=b0e3fc157b8e34264357a60661bf42b3116f2829)
2026 Omega Speedmaster Professional White Dial 310.32.42.50.04.002 Full Set $7,300
A modern Omega Speedmaster Professional with a lacquered white dial, powered by the Co-Axial Master Chronometer Calibre 3861, featuring a clean and high-contrast look while maintaining the iconic Speedmaster design.
- Condition: Like new
- Case size: 42mm diameter
- Case material: Stainless steel
- Movement: Manual wind (Omega Calibre 3861 Master Chronometer)
![[WTS] Omega Speedmaster ‘57 reference 331.12.42.51.01.001 - Complete set with hang tag, undated](https://preview.redd.it/f32y8cpys5xg1.jpg?width=640&crop=smart&auto=webp&s=9a8bab4cc3c7cf5959ef3b7750de2911e75b6fe6)
Omega Speedmaster ‘57 reference 331.12.42.51.01.001 - Complete set with hang tag, undated
For sale is an Omega Speedmaster '57 reference 331.12.42.51.01.001, complete set with hang tag and undated.
- Condition: undated
- Diameter: 42mm
![[WTS] 2025 Omega Speedmaster Racing 329.32.44.51.06.001 44MM Full Set](https://preview.redd.it/jqduxu50d5xg1.jpg?width=640&crop=smart&auto=webp&s=8deae4882e10508618038273b03761ff17bf2af0)
2025 Omega Speedmaster Racing 329.32.44.51.06.001 44MM Full Set
This is a 2025 Omega Speedmaster Racing Chronograph with a silver/grey dial and a 44mm case size. It comes as a full set with box, papers, and warranty coverage through January 2030.
- Condition: Excellent
- Case Size: 44mm diameter
- Box And Papers: true
![[WTS] 2025 Omega Speedmaster Professional Sapphire](https://preview.redd.it/4w8awycw75xg1.jpg?width=640&crop=smart&auto=webp&s=e607ec239e37165ba4c0861937d63c09dba8b604)
2025 Omega Speedmaster Professional Sapphire
This Omega Speedmaster Professional Sapphire is being sold with a full kit and has been pressure tested at the Omega AD in April. It comes with a luna replica NASA velcro strap for reference.
- Purchase History: purchased from this subreddit
- Inclusions: full kit, luna replica NASA velcro strap
- Wrist Size Reference: 6.5"
![[WTS] Omega Speedmaster Reduced 3510.50 Bracelet Set - 22 Links, Full size, 94/100 Condition, OEM 1469/811](https://preview.redd.it/taikxlm415xg1.jpg?width=640&crop=smart&auto=webp&s=f245081162d357c47d7b6b3809af19d26af75cb0)
Omega Speedmaster Reduced 3510.50 Bracelet Set - 22 Links, Full size, 94/100 Condition, OEM 1469/811
This is an original Omega Speedmaster Reduced bracelet set in excellent condition, featuring a stainless steel finish and a folding clasp with tight action.
- Condition: 94/100 - excellent vintage condition
- Bracelet reference: 1469
- Endlinks reference: 811 (pair included)
- Total links: 22 (full complete set)
![[WTS][US] Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm - 311.30.40.30.01.001 - Full Set](https://preview.redd.it/m3izndiju4xg1.jpg?width=640&crop=smart&auto=webp&s=d11e2103db56fbc3968db4eeff3f6a5576d0227e)
[US] Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm - 311.30.40.30.01.001 - Full Set
A Omega Speedmaster Calibre 321 in black dial, with a 39.7mm case size and reference number 311.30.40.30.01.001.
- Condition: pristine with minor hairlines on clasp, case, and bracelet
- Diameter: 39.7mm
![[WTS][US] Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set](https://preview.redd.it/woqvcyeot4xg1.jpg?width=640&crop=smart&auto=webp&s=a205a132894ffa2a95f0b64cd7bd76baf623c305)
[US] Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set
Up for sale is an Omega Speedmaster Moonwatch Professional - White Dial, in fantastic condition and functions perfectly.
- Condition: pristine with minor hairlines on clasp, case, and bracelet
- Case size: 42mm diameter
![[WTS] Omega Speedmaster 50th Anniversary – No. 927/1957 – Limited Edition – Full Set](https://preview.redd.it/pftawhesa2xg1.jpg?width=640&crop=smart&auto=webp&s=c19380bf0d50e862acc98c793aff208d265c83ea)
Omega Speedmaster 50th Anniversary – No. 927/1957 – Limited Edition – Full Set
A numbered Omega Speedmaster 50th Anniversary Limited Edition, No. 927 of 1,957 pieces, a highly collectible tribute to the original 1957 Speedmaster.
- Condition: Very good overall condition with honest wear
- Case size: 42mm diameter
- Dial material: black enamel
- Movement type: Omega manual-wind chronograph