Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman
Reference 310.30.42.50.01.003
About this watch
The Omega Speedmaster Professional Moonwatch 3861 is a piece of history wrapped around your wrist, with its rich lineage and modern upgrades capturing the hearts of watch enthusiasts and collectors alike. This manual-winding chronograph movement features a co-axial escapement and silicon balance spring, making it resistant to magnetic fields up to 15,000 gauss. The plexi glass provides a warm, vintage feel that many collectors adore, while the stainless steel case measures 42mm in diameter and has a water resistance of 50 meters. This timepiece is perfect for everyday wear, suitable for both formal and casual occasions. With its stunning design, robust movement, and versatility, it's a celebration of heritage, precision, and style.
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Key Features
- Omega Caliber 3861 Movement
- Plexi Glass with Vintage Feel
- 42mm Stainless Steel Case
- 50m Water Resistance
- Manual-Winding Chronograph Function
- Co-Axial Escapement and Silicon Balance Spring
Specifications
- Brand
- Omega
- Family
- Speedmaster
- Model
- Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman
- Reference
- 310.30.42.50.01.003
- Movement
- 3861
- Movement Features
-
- Small Seconds, Hours, Minutes
- Chronograph
- Chronometer
- Case
- Stainless Steel 42mm
- Dial Color
- Black
- Crystal
- Plexi
- Water Resistance
- 50
Current Listings
![[WTS] 2021 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Stainless Steel Black Dial - $5,900](https://preview.redd.it/1lvmm9pfbjhg1.png?width=640&crop=smart&auto=webp&s=4bc3f746cb4f4c76e4236a91230c84e3ada438dc)
2021 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Stainless Steel Black Dial - $5,900
This is a 2021 Omega Speedmaster Moonwatch Chronograph with a stainless steel black dial and Hesalite crystal.
- Condition: Excellent overall condition
- Box: Original Double Omega boxed
- Papers: Yes (Box and Papers)
- Warranty: 5 year manufacturer warranty
2021 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Stainless Steel Black Dial - $5,900
2021 Omega Speedmaster Moonwatch in stainless steel with a black dial and 42mm case size.
- Case size: 42mm
![[WTS] 2025 Mint Omega Speedmaster 321 Calibre "Ed White" 311.30.40.30.01.001 - Full Set Both Omega Straps w/ Extra Forstner Bracelet](https://preview.redd.it/f95nquej9jhg1.jpg?width=640&crop=smart&auto=webp&s=b87f2cd47ae3924b32202e7766dc09c8a61a8066)
2025 Mint Omega Speedmaster 321 Calibre "Ed White" 311.30.40.30.01.001 - Full Set Both Omega Straps w/ Extra Forstner Bracelet
This Omega Speedmaster Calibre 321 'Ed White' is a highly sought-after collector's piece, featuring the iconic 321 movement in pristine condition. It comes with its original box, papers, and accessories, including an extra Forstner bracelet.
- Condition: Very Excellent pre-owned condition
- Movement: Omega Caliber 321 (manual-wind chronograph)
- Case material: Stainless steel
- Case size: 39.7mm
![[WTS] Selling my Omega Speedmaster Professional Moonwatch Hesalite 311.33.42.30 with big box asking $3999 CONUS + shipping](https://preview.redd.it/2gor0lspiihg1.jpg?width=640&crop=smart&auto=webp&s=3b58c5952156912d58e21f985e8dbdd7ce5c9cae)
Selling my Omega Speedmaster Professional Moonwatch Hesalite 311.33.42.30 with big box asking $3999 CONUS + shipping
Recently purchased Omega Speedmaster Professional Moonwatch Hesalite, in good condition, with a beautifully repaired leather strap. The watch runs well and keeps time accurately.
- Condition: good condition, minor damage on leather strap
- Leather strap condition: minor damage with visible repair
- Strap included: no
![[WTS] Omega Speedmaster ref. 310.30.42.50.1.001. Super nice condition, watch only. Fully linked and running perfectly. $4900 shipped conus.](https://preview.redd.it/2nrvbojbdehg1.jpg?width=640&crop=smart&auto=webp&s=3409712a4ecd2edefad3aa8f6aeac556e72d033e)
Omega Speedmaster ref. 310.30.42.50.1.001. Super nice condition, watch only. Fully linked and running perfectly. $4900 shipped conus.
A well-maintained Omega Speedmaster in excellent working order, fully linked.
- Condition: super nice condition, watch only
![[WTS] Omega Speedmaster Professional MOONPHASE! - 3575.20 - $3,999 Shipped!](https://external-preview.redd.it/YXVwM3NsdWpzZGhnMWicYa9ug2kZ39M-cyj_1nRzbpeGESY-5h4_u59SWiZT.png?format=pjpg&auto=webp&s=51a83cab4217047aad7844834d6dd55a35228452)
Omega Speedmaster Professional MOONPHASE! - 3575.20 - $3,999 Shipped!
A Omega Speedmaster Professional with a moonphase function is being sold.
- Model type: Speedmaster Professional
- Functionality: Moonphase
![[WTS] Omega Speedmaster Reduced Black Mother of Pearl - Full Serviced! - $2,999 Shipped!](https://external-preview.redd.it/cXIzbnVoNDNwZGhnMWS7ISgFPR9dxkEkzd9yp-ffpmCIPPRB2eQAtK3fjplg.png?format=pjpg&auto=webp&s=cc0160ee050c653c06f8f89789509d204791c794)
Omega Speedmaster Reduced Black Mother of Pearl - Full Serviced! - $2,999 Shipped!
This Omega Speedmaster Reduced Black Mother of Pearl is a watch that features a unique mother-of-pearl dial. It has been fully serviced.
- Serviced: true
![[WTS] Omega Speedmaster 3520.50 Triple Calendar Mk40 Cosmos - Box & Paper - $1999 SHIPPED](https://preview.redd.it/lsw3l7vi9dhg1.jpeg?auto=webp&s=b77afd0310ded94aeed6dd6efe4a4ad0b34ed2d9)
Omega Speedmaster 3520.50 Triple Calendar Mk40 Cosmos - Box & Paper - $1999 SHIPPED
This Omega Speedmaster Triple Calendar Mk40 Cosmos features a 39mm case size, black dial, and bezel, powered by the Omega 1151 Caliber. It has a day, date, and month function.
- Condition: Fair user condition
- Case size: 39mm
- Lug-to-lug: 44.75mm
- Bracelet size: fits up to 6.75"
![[WTS] Omega Speedmaster Professional Moonwatch Full Steel 145.022-69 Ghost Bezel Yellow Patina Step Dial 1969 (Serviced) 🔥](https://preview.redd.it/tynbsfum0dhg1.jpg?width=640&crop=smart&auto=webp&s=d2b5d442477b2cec8a23db4197d4bf69660c4c9d)
Omega Speedmaster Professional Moonwatch Full Steel 145.022-69 Ghost Bezel Yellow Patina Step Dial 1969 (Serviced) 🔥
This Omega Speedmaster Moonwatch presents beautifully in full steel, showcasing a strong and sharp case with thick lugs that retain their original shape. The step dial displays a warm yellow patina across the hour markers and matching hands, creating a cohesive vintage appeal. The tritium lume remains reactive under UV light.
- Condition: Serviced, lightly polished case
- Size: 42mm diameter
- Year: 1969
- Movement: 861 caliber, professionally serviced