Omega Speedmaster Speedmaster Professional Missions Gemini XII

Reference 3597.10.00

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.

Buy Now on Jomashop

This is an affiliate link

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

Current Listings

Omega Speedmaster Professional Moonwatch – 2021 – Hesalite – Excellent

Omega - 310.30.42.50.01.001 · $5,150

This is the new generation reference 3861, featuring the updated Master Chronometer movement and classic hesalite crystal, keeping the traditional Moonwatch look.

Condition: Excellent
Case Size: 42mm diameter
Movement: Manual Wind (Omega Caliber 3861)
Crystal: Hesalite

Posted at

Mar 12, 2026, 4:12 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Reduced Two Tone - 39mm - 175.0033 - $2,750 Shipped

Omega - 175.0033 · $2,750

For sale is a Beautiful Omega Speedmaster Reduced, this is the white dial version.

Condition: Great vintage condition, light hairlines on bezel and case
Case size: 39mm
Material: Two Tone
Movement status: Running

Posted at

Mar 12, 2026, 3:18 PM

Active

View listing on r/WatchExchange

Omega Speedmaster 38 Co-Axial Chronograph 324.30.38.50.01.001 – Full Set – $3,800 + shipping

Omega - 324.30.38.50.01.001 · $3,800

The Omega Speedmaster 38 Co-Axial Chronograph features a black dial on the stainless steel bracelet, with typical hairline marks on the bracelet and a small scratch on the clasp. The crystal and dial are clean. This watch comes in its full set.

Condition: great condition with light wear
Bracelet size: not specified
Crystal type: not specified
Dial color: black

Posted at

Mar 12, 2026, 12:19 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Moonwatch Sapphire 310.30.42.50.01.002 with Box & Manuals

Omega - 310.30.42.50.01.002 · $6,150

This Omega Speedmaster Professional Moonwatch features a stainless steel case, black bezel, and manual wind mechanical movement.

Condition: Nice Preowned Condition with Some Light Scratches on the Case, Bracelet and Buckle
Case dimensions: 42mm diameter
Bezel material: Stainless Steel
Dial color: Black

Posted at

Mar 11, 2026, 7:04 PM

Active

View listing on r/WatchExchange

OMEGA X SWATCH Speedmaster Uranus

Omega · $350

A Speedmaster watch, purchased on vacation in Thessaloniki Greece, that has been worn less than 5 times and is not suited for the seller's lifestyle.

Condition: Very good

Posted at

Mar 11, 2026, 4:20 PM

Active

View listing on r/WatchExchange

OMEGA X SWATCH Speedmaster Pluto

Omega - Speedmaster · $350

Condition: Excellent, possibly only worn once
Origin: Purchased in Paris at the Le Marais boutique

Posted at

Mar 11, 2026, 4:16 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Reduced 3510.50 39mm Watch Only $2,500

Omega - 3510.50 · $2,500

A Speedmaster Reduced from Omega, a watch only sale with the bracelet fitting about 18cm wrists.

Shipping origin: Singapore
Shipping to usa: 4-5 business days
Payment methods: Wise, Revolut, Wire Transfer, Crypto, Venmo

Posted at

Mar 11, 2026, 5:20 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Moonwatch (Hesalite)

Omega - 310.30.42.50.01.001 · $5,750

This modern Omega Speedmaster Professional Moonwatch features Master Chronometer technology, a stainless steel case, and a black anodized aluminum tachymeter bezel.

Condition: Excellent
Case size: 42mm
Movement type: Co-Axial Master Chronometer Caliber 3861
Power reserve: 50 hours

Posted at

Mar 11, 2026, 12:04 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Automatic Day-Date 3520.50.00 MK 40 | Great Condition (Serviced) | $2450

Omega - 3520.50.00 MK 40 · $2,450

The Omega Speedmaster Automatic Day-Date features a stainless steel case with a twisted-lug design and domed sapphire crystal, powered by the modified Valjoux 7751 automatic chronograph movement.

Condition: Great condition, serviced
Movement: Omega 1151 (modified Valjoux 7751)
Case dimensions: 39mm diameter, 44.75mm lug-to-lug, 14mm thick
Lug width: 18mm

Posted at

Mar 10, 2026, 10:34 PM

Active

View listing on r/WatchExchange