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] 2019 Omega Speedmaster Grey Side of the Moon Meteorite - Full set Box and papers - Ref# 311.63.44.51.99.001](https://preview.redd.it/xpyxwz2zsvxe1.jpg?width=640&crop=smart&auto=webp&s=454c4d526a0f5f9622e08efbc29fdb81a713e98e)
2019 Omega Speedmaster Grey Side of the Moon Meteorite - Full set Box and papers - Ref# 311.63.44.51.99.001
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
![[WTS] Omega Speedmaster 50th Anniversary Silver Snoopy Award 310.32.42.50.02.001](https://preview.redd.it/ozioe2utvvxe1.jpg?width=640&crop=smart&auto=webp&s=97af23946c0e6b4eb81301240347e40f5544c4b7)
Omega Speedmaster 50th Anniversary Silver Snoopy Award 310.32.42.50.02.001
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
![[WTS] Omega Speedmaster ref. 3520.50 Automatic Triple Date](https://preview.redd.it/6lc6nrh4mvxe1.jpeg?auto=webp&s=dd5f70e5ed0007ba52de38b63def86ecc9b0e3de)
Omega Speedmaster ref. 3520.50 Automatic Triple Date
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
![[WTS] Omega Speedmaster Triple Date 3521.30](https://preview.redd.it/49xz1epmlvxe1.jpg?width=640&crop=smart&auto=webp&s=8f554e8a4280fae231e7e8acc8444b0b276ab362)
Omega Speedmaster Triple Date 3521.30
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
![[WTS] Omega Seamaster NTTD on NATO | Omega Speedmaster Moonphase | Tudor Black Bay 58 Burgundy Dial](https://external-preview.redd.it/ZTY4bWZ4bGJodnhlMX2ZAmm3m__UWu54-FfX3UPUvQkTQycMWMcuh2VFgbPU.png?format=pjpg&auto=webp&s=4087ca8c8d5742544a1c4a23d5746ad4c9e664ed)
Omega Seamaster NTTD on NATO | Omega Speedmaster Moonphase | Tudor Black Bay 58 Burgundy Dial
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
![[WTS] 4️⃣4️⃣0️⃣0️⃣Omega Speedmaster Moonwatch](https://preview.redd.it/2fk1dosnvuxe1.jpg?width=640&crop=smart&auto=webp&s=d9fd3a577e9d313d603b01dd837a607e5efabc35)
4️⃣4️⃣0️⃣0️⃣Omega Speedmaster Moonwatch
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
OMEGA Speedmaster Day‑Date 3523.30.00 | Double Boxed + Pictogram Card
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

Omega Speedmaster - Dark Side of the Moon - 311.92.44.51.01.007 ( new / 2024 )
This Omega Speedmaster Moonwatch Dark Side of the Moon features a Titanium Deployment Clasp and Ceramic Black Case with a 44.25mm diameter.
- Condition: Brand New
- Case material: Ceramic, Titanium
- Movement: Omega Co-Axial Calibre 9300

Omega Speedmaster - FOIS - 310.30.40.50.06.001 ( excellent / 2024 )
This is an excellent condition Omega Speedmaster FOIS 39.7mm Stainless Steel Case with the Omega 3861 Calibre, a First Omega in Space model.
- Condition: Excellent condition
- Case size: 39.7mm diameter
- Caliber: Omega 3861