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.
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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] 2024 Omega Speedmaster Moonwatch Professional 310.30.42.50.01.002 “Sapphire Sandwich”](https://external-preview.redd.it/LIk5Joauzsq1PMVw1w6IICTUxy9cmDcEzFlzCA48tqM.jpeg?auto=webp&s=8aab8c05c70eab0cadcf091ab2805490c79cf38a)
2024 Omega Speedmaster Moonwatch Professional 310.30.42.50.01.002 “Sapphire Sandwich”
The watch being listed is a 2024 Omega Speedmaster Moonwatch Professional in the 310.30.42.50.01.002 'Sapphire Sandwich' model.
- Condition: Pre-owned with slight wear
- Bracelet type: non-quick adjust
- Service history: unknown
- Accuracy: +3 s/d (seconds/minute)
![[WTS] 1997 Omega Speedmaster 'Gemini V' LE of 150 PCS (Ref. 345.0022)](https://preview.redd.it/t0ngd74yii6f1.jpeg?auto=webp&s=7beba2e03f294b61631486f6f95a9bcfbf448d05)
1997 Omega Speedmaster 'Gemini V' LE of 150 PCS (Ref. 345.0022)
This Omega Speedmaster 'Gemini V' LE watch commemorates the NASA Gemini V mission, featuring a unique design with a NASA mission patch in the 9 o'clock sub-dial.
- Condition: Excellent/like new
- Case Size: 42mm
- Bracelet Type: Omega 1499 bracelet
- Bracelet End Pieces: 842
![[WTS] Two Tone Omega Speedmaster Triple Date Moonphase](https://external-preview.redd.it/LPtmDtmcr5ceccbryLfEfNFJXwFHvHuKVVJwuyHxkpU.jpeg?auto=webp&s=0f99953af62e6a25bd99a787d5e8e940d0c5487c)
Two Tone Omega Speedmaster Triple Date Moonphase
A beautiful two-tone Omega Speedmaster triple date moonphase watch with a silky white dial, gold bezel, and moon-phase sub-dial.
- Condition: Good condition with normal wear on the case and bezel
- Movement: Cal 1152
- Size: 39mm diameter
- Case material: Two tone
![[WTS] Two Tone Omega Speedmaster Reduced](https://external-preview.redd.it/w8-wkeNiEyq60tpiHd01NbUeHiv47S--7J_gXy0Zgt4.jpeg?auto=webp&s=0fd98a91dd5016c3da476eea514c628806bc4b0b)
Two Tone Omega Speedmaster Reduced
A two-tone Omega Speedmaster Reduced in overall good condition with a white dial, gold subdials, and an 18k gold bezel.
- Condition: Good condition with wear on the case and bezel
- Movement: Cal 1140
- Case size: 39mm diameter

Omega SPEEDMASTER PROFESSIONAL MOONWATCH 3861 WHITE DIAL 2025 WARRANTY FULL SET
This is a new 2025 model Omega Speedmaster Professional Moonwatch with a 42mm stainless steel case and white dial, featuring a manual-winding chronograph movement with co-axial escapement.
- Condition: Excellent Condition
- Movement: 3861 Manual-Winding Chronograph
- Case material: Stainless Steel
- Diameter: 42mm
![[WTS] Omega Speedmaster Automatic MK40 Day Date Ref 3520.53](https://external-preview.redd.it/7nGkjbMhVxrm84CqOK5ux_m_3x-lP765HQ1Dz5Kr_aU.jpeg?auto=webp&s=914f577263d19c6a84251a5d3b5824ad90e22b02)
Omega Speedmaster Automatic MK40 Day Date Ref 3520.53
One of the coolest Speedmaster variants, featured in A Man and His Watch, with a tritium dial and luminova hands.
- Condition: Pre-owned, with wear and dings on the bezel, insert, and case
- Case size: 39mm diameter

Omega Speedmaster Professional Tokyo 2020 522.30.42.30.03.001
This Omega Speedmaster Professional Tokyo 2020 is a high-end watch that comes with its original boxes and books, but no warranty card. It's in excellent condition.
- Condition: Excellent condition
- Box And Papers: includes
- Warranty Card: no
![[WTS] Omega Speedmaster Professional Sapphire 3861](https://external-preview.redd.it/GFyeMHjiQugc7k3v7DpjwLCL0zKQBy4P6cRRNI8ynoc.jpeg?auto=webp&s=ba20feb41ea99b61fea9993fbc3097cd9d62b82c)
Omega Speedmaster Professional Sapphire 3861
A Omega Speedmaster Professional Sapphire Sandwich sold on an OEM rubber strap, also including an unworn leather strap and full kit of original accessories.
- Condition: Excellent preowned
- Strap included: 2
- Case condition: preowned