Omega Speedmaster Speedmaster Professional Missions Gemini XII

Reference 3597.10.00

Omega Speedmaster Professional Missions Gemini XII

About this watch

The Omega Speedmaster Professional Missions Gemini XII stands out as a beacon of excellence in the world of luxury watches. This limited edition timepiece, produced between 1997 and 1998, is a tribute to NASA's Gemini program and features a stunning design that whispers elegance without being loud. The sleek stainless steel case, black dial with stick indexes and dot markers, and tachymeter bezel all contribute to its timeless appeal. Powered by the Omega caliber 1861 movement, a hand-wound chronograph known for its reliability and precision, this watch is suitable for both everyday wear and special occasions. With only 200 units made, owning an Omega Speedmaster Gemini XII is like holding a piece of horological history. Its historical significance adds a layer of intrigue that few other watches can match, making it a must-have for collectors, space enthusiasts, and those who appreciate the finer things in life.
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Key Features

  • Limited edition of 200 units
  • Omega caliber 1861 hand-wound chronograph movement
  • 42mm diameter stainless steel case
  • Black dial with stick indexes and dot markers
  • Tachymeter bezel for measuring speed
  • Water resistance of 50 meters
  • 20mm lug width for versatility

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Missions Gemini XII
Reference
3597.10.00
Movement
1861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
Case
Stainless Steel 42mm
Dial Color
Black
Crystal
Plexi
Water Resistance
50

Current Listings

[WTS] Omega Speedmaster Reduced 3510.50 - $2,390

Omega Speedmaster Reduced 3510.50 - $2,390

Omega - 3510.50 · $2,390
Up for sale is my Omega Speedmaster Reduced 3510.50 in great condition. It features a steel case and original speedmaster bracelet.

  • Condition: great condition, minimal wear
  • Bracelet length: original
  • Box included: yes
  • Shipping: Fedex Priority Shipping from Philippines, 3-5 days globally
Posted at
Apr 14, 2026, 4:26 AM
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[WTS] Omega Speedmaster Reduced Automatic 3510.50 – Black Dial – $3,000

Omega Speedmaster Reduced Automatic 3510.50 – Black Dial – $3,000

Omega - Speedmaster Reduced Automatic 3510.50 · $3,000
a Omega Speedmaster Reduced Automatic with a black dial is for sale.

  • Dial color: Black
Posted at
Apr 14, 2026, 2:55 AM
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[WTS] Omega Speedmaster Triple Calendar Day-Date Ref.3221.30.00 40mm | Great Condition (With Box & Serviced) | $2400

Omega Speedmaster Triple Calendar Day-Date Ref.3221.30.00 40mm | Great Condition (With Box & Serviced) | $2400

Omega - 3221.30.00 · $2,400
The Omega Speedmaster Triple Calendar Day-Date Ref.3221.30.00 is a more feature-packed take on the classic Speedmaster, with a stainless steel case, sapphire crystal, and Caliber 3606 movement.

  • Condition: Great condition, serviced
  • Case size: 40mm diameter
  • Thickness: 15mm
  • Water resistance: 100m
Posted at
Apr 13, 2026, 11:07 PM
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[WTS] Omega Speedmaster Reduced 3510.50 Bracelet Set - 22 Links, Full size, 94/100 Condition, OEM 1469/811

Omega Speedmaster Reduced 3510.50 Bracelet Set - 22 Links, Full size, 94/100 Condition, OEM 1469/811

· $649
A vintage Omega Speedmaster Reduced bracelet for sale in excellent condition, featuring a stainless steel finish and an original Omega folding clasp.

  • Condition: 94/100
  • Model compatibility: Omega Speedmaster Reduced 3510.50 (18 mm lug)
  • Bracelet reference: 1469
  • Endlinks reference: 811 (pair included)
Posted at
Apr 13, 2026, 10:51 PM
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[WTS] 2024 MINT Omega Speedmaster Moonwatch Professional Full Set $6️⃣,5️⃣0️⃣0️⃣ + ✈️🇺🇸

2024 MINT Omega Speedmaster Moonwatch Professional Full Set $6️⃣,5️⃣0️⃣0️⃣ + ✈️🇺🇸

Omega - 310.30.42.50.01.002 · $6,500
2024 Omega Speedmaster Moonwatch Professional Full Set, Ref. 310.30.42.50.01.002, priced to fly.

  • Shipping included in price: no
Posted at
Apr 13, 2026, 10:47 PM
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[WTS] Omega Speedmaster Professional Polar White

Omega Speedmaster Professional Polar White

Omega - 310.32.42.50.04.001 · $6,999
A beautiful Omega Speedmaster Professional Polar White, a manual wind watch in excellent condition.

  • Condition: great condition with minimal wear on the case
  • Size: 42mm diameter
  • Movement: 3861 manual wind
Posted at
Apr 13, 2026, 9:17 PM
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[WTS] Omega Speedmaster Professional 3861 Sapphire Sandwich (12/2024) – Full Kit – Unworn Bracelet

Omega Speedmaster Professional 3861 Sapphire Sandwich (12/2024) – Full Kit – Unworn Bracelet

Omega - 310.30.42.50.01.002 · $6,750
Up for sale is my Omega Speedmaster Professional ref. 310.30.42.50.01.002 (sapphire sandwich) with a December 2024 warranty card. This latest-generation Moonwatch features the Co-Axial Master Chronometer caliber 3861 and sapphire display caseback.

  • Condition: Excellent – minimal wear
  • Case size: 42mm
  • Crystal material: Sapphire (front + exhibition caseback)
  • Movement type: Co-Axial Master Chronometer caliber 3861
Posted at
Apr 13, 2026, 8:05 PM
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[WTS] 2023 Omega Speedmaster Professional Moon Watch HESALITE 3861 $6200 USD

2023 Omega Speedmaster Professional Moon Watch HESALITE 3861 $6200 USD

Omega - 3861 · $6,200
This is a 2023 Omega Speedmaster Professional Moon Watch HESALITE, in excellent condition. It comes with a micro adjust clasp and has been well taken care of.

  • Condition: Excellent
Posted at
Apr 13, 2026, 3:36 PM
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[WTS] Omega Speedmaster Professional Moonwatch Tropical Brown Dial Heavy Patina Blue Insert 1969 (Box/Serviced) 🤎

Omega Speedmaster Professional Moonwatch Tropical Brown Dial Heavy Patina Blue Insert 1969 (Box/Serviced) 🤎

Omega - 145.022-69 · $14,995
A 1969 Omega Speedmaster Moonwatch with a tropical brown dial and heavy yellow patina, featuring a period-correct super tropical dial and tritium hands that glow green under UV light.

  • Condition: Beautiful condition with heavy patina
  • Size: 42mm diameter
  • Year: 1969
  • Movement serviced: true
Posted at
Apr 13, 2026, 2:36 PM
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