Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman

Reference 310.30.42.50.01.003

Omega Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman

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

Current Listings

Omega Speedmaster Leather Racing Strap OEM Z019270

Omega - Z019270 · $300

This is an original leather racing strap from Omega that came with a Speedmaster Professional white dial sapphire sandwich reference 310.32.42.50.04.002 watch.

Material: Leather (Perforated)
Color: Black (with white stitching on the outer side and red stitching on the interior)
Lug width: 20mm

Posted at

Apr 13, 2026, 1:01 PM

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Hruodland Quartz Chronograph- Vintage Omega Speedmaster TV Dial Homage

Omega - Speedmaster TV Dial Homage · $160

A vintage-inspired quartz chronograph with a cushion case and day-date complication. The watch features a bold design and is in great shape.

Condition: Excellent, lightly used
Movement type: Quartz chronograph
Day-date complication: true
Bezel function: Tachymeter

Posted at

Apr 13, 2026, 12:18 PM

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Omega Speedmaster Professional Moonwatch Full Steel Yellow Patina 1978 (Serviced)

Omega - 145.022-78 · $5,050

This Omega Speedmaster Professional Moonwatch features a yellow patina black tritium dial and a 42mm case with sharp lugs. The watch is fitted with its original bracelet and has been professionally serviced in February 2026.

Condition: Very good overall shape with some polishing on the case
Size: 42mm diameter
Year: 1978
Case material: full steel

Posted at

Apr 13, 2026, 12:18 PM

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Omega Speedmaster Date Chronometer 3210.50.00 — Big Seahorse, Cal. 1164 (Serviced) — $2,200 Shipped (Tariff Coverd)

Omega - 3210.50.00 · $2,200

Condition: Honest wear consistent with age
Case serial: 86172720
Caseback medallion: Big Seahorse
Movement: Omega Cal. 1164 (ETA 7750 base)

Posted at

Apr 13, 2026, 12:13 PM

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[US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

Omega - 310.30.42.50.01.004 · $10,900

This Omega Speedmaster Moonwatch Professional features a 42mm case and is part of the Reverse Panda collection.

Condition: Brand new, unworn
Size: 42mm diameter
Set: Full Set

Posted at

Apr 13, 2026, 8:31 AM

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BNIB Omega Speedmaster Professional 310.30.42.50.01.001 $6,800

Omega - 310.30.42.50.01.001 · $6,800

The Omega Speedmaster Professional features a robust and elegant 42mm stainless steel case powered by the updated caliber 3861 movement with its Co-Axial escapement, offering enhanced durability, accuracy, and visibility of the dial.

Condition: Brand new in box with warranty
Case size: 42mm diameter
Case thickness: 13.2mm height
Lug width: 20mm

Posted at

Apr 12, 2026, 4:32 PM

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Omega Speedmaster Professional Sapphire Sandwich 2021 $6795

Omega - Speedmaster Professional Sapphire Sandwich 2021 · $6,795

This Omega Speedmaster Professional is a sapphire sandwich model from 2021.

Image Url: https://imgur.com/a/BQeTMO3

Posted at

Apr 12, 2026, 12:41 PM

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Omega Speedmaster Schumacher Reduced - 3510.80

Omega - 3510.80 · $3,799

The Omega Speedmaster Racing CART Edition is a rare and highly sought-after watch in excellent/mint condition, featuring a 39mm stainless steel case and vibrant signature blue dial.

Condition: Excellent/Mint
Case Size: 39mm diameter
Material: stainless steel

Posted at

Apr 12, 2026, 12:45 AM

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PRICE DROP! Rare Vintage Omega Speedmaster Teutonic Ghost Gray Dial Bead Blasted Ref 145.0044

Omega - 145.0040 · $2,795

This rare vintage Omega Speedmaster Teutonic features a gray ghost dial, bead-blasted case, and integrated bracelet. It has a manual wound cal 861 movement, chronograph functions, and original tritium lume.

Condition: Pre-owned with wear, scratches, and nicks
Diameter: 42mm
Movement: Manual wound Omega cal 861
Bracelet length: up to app 7.25 inches

Posted at

Apr 11, 2026, 8:17 PM

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