Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 42 Mécanique 24 Sapphires / Short Strap

Reference 2912.50.48

Omega Seamaster Planet Ocean 600M Co-Axial 42 Mécanique 24 Sapphires / Short Strap

About this watch

The Omega Seamaster Planet Ocean 600M Co-Axial 42 (model number 2912.50.48) is a statement piece that exudes luxury and sophistication. Its blend of white gold and stainless steel creates a sumptuous feel, while the gem-set bezel adds an air of elegance. The stunning blue dial with mother-of-pearl finish is a true masterpiece, reflecting light beautifully and changing hues as you move it around. The mixed indexes and arrow hands enhance readability, ensuring that you can tell the time at a glance, even underwater. At the heart of this watch is the innovative Omega caliber 2500 movement, a co-axial version of the ETA 2892-A2, promising precision, reliability, and durability. With its impressive water resistance of 600 meters, this watch is perfect for both diving enthusiasts and those who appreciate high-end horology.

Buy Now on Jomashop

This is an affiliate link

Key Features

Omega Caliber 2500 Co-Axial Movement
600M Water Resistance
White Gold and Stainless Steel Case
Gem-Set Bezel
Blue Mother of Pearl Dial
Mixed Indexes and Arrow Hands
Sapphire Crystal

Specifications

Brand

Omega

Family

Seamaster Planet Ocean

Model

Seamaster Planet Ocean 600M Co-Axial 42 Mécanique 24 Sapphires / Short Strap

Reference

2912.50.48

Movement

2500

Movement Features

Hours, Minutes, Seconds
Date
Co-Axial Escapement, Chronometer

Case

42mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

600

Current Listings

Omega Seamaster Planet Ocean 600m, 232.90.42.21.03.00, 42mm with titanium case and bracelet, blue dial and bezel, box & papers

Omega - 232.90.42.21.03.00 · $4,600

This Omega Seamaster Planet Ocean 600m features a 42mm titanium case, blue dial, and titanium bracelet, along with a helium escape valve, screw down crown, and exhibition case back. It's a classic dive watch with functional features.

Condition: Good, previously cherished condition with scratches present on underside of bottom left lug from bracelet removal
Case diameter: 42mm
Bracelet material: Titanium
Water resistance: 600m

Posted at

Apr 5, 2026, 12:36 PM

Active

View listing on r/WatchExchange

2025 Omega Seamaster Planet Ocean 600m Titanium Blue 232.92.44.22.03.001 Full Set - $5,295

Omega - 232.92.44.22.03.001 · $5,295

A 2025 Omega Seamaster Planet Ocean 600m Titanium Blue is being sold in excellent condition, with a titanium blue finish and a water resistance rating of 600m.

Condition: Excellent condition with minimal signs of wear
Water Resistance: 600m
Year: 2025

Posted at

Apr 4, 2026, 11:37 AM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean Ultra Deep 215.30.46.21.04.001 $7,899

Omega - 215.30.46.21.04.001 · $7,899

The Omega Seamaster Planet Ocean Ultra Deep is a technically impressive dive watch with a staggering 6,000-meter depth rating and high-performance engineering.

Condition: Minty condition, excellent time keeping
Case diameter: 45mm
Lug width: 22mm
Depth rating: 6000m

Posted at

Apr 4, 2026, 11:05 AM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean 8500 Orange😍🍊 45.5mm 232.32.46.21.01.001

Omega - 232.32.46.21.01.001 · $4,500

Additional Details: Model: Omega Seamaster Planet Ocean 8500 45.5mm

Condition: great condition
Case size: 45.5mm diameter

Posted at

Apr 3, 2026, 11:22 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean Chronograph 45.5mm 232.30.46.51.01.001

Omega - 232.30.46.51.01.001 · $4,500

A Omega Seamaster Planet Ocean Chronograph with a 45.5mm case, this watch features chronograph functionality.

Condition: Excellent condition and full set
Case size: 45.5mm

Posted at

Apr 3, 2026, 11:20 PM

Active

View listing on r/WatchExchange

OMEGA Seamaster Planet Ocean 600M Ref. 232.32.42.21.01.003 - COMPLETE SET! 🔥$4,150🔥

OMEGA - 232.32.42.21.01.003 · $4,150

The OMEGA Seamaster Planet Ocean 600M Ref. 232.32.42.21.01.003 is a robust and elegant dive watch that embodies OMEGA's commitment to ocean exploration and precision engineering.

Condition: VERY GOOD, few superficial scratches on case
Water resistance: 600m (2000ft)
Movement: Co-Axial Caliber 8500
Case size: 42mm

Posted at

Apr 3, 2026, 8:56 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean Chronograph 9300 Orange 45.5mm 232.32.46.51.01.001

Omega - 232.32.46.51.01.001 · $4,500

This Omega Seamaster Planet Ocean Chronograph features a 45.5mm diameter case and an orange strap that was swapped for black.

Case size: 45.5mm diameter
Band swap: orange to black

Posted at

Apr 3, 2026, 8:52 PM

Active

View listing on r/WatchExchange

OMEGA Seamaster Planet Ocean 42mm ref. 2201.50 - $3200

OMEGA - 2201.50 · $3,200

A 42mm Omega Planet Ocean watch in good condition, featuring a strong movement and a great bracelet.

Condition: Gently preowned with minor scratches and dings on the case, bezel wear, and light scratches around the lugs
Case Size: 42mm
Bracelet Condition: great shape with minimal signs of use

Posted at

Apr 3, 2026, 10:30 AM

Active

View listing on r/WatchExchange

2024 Omega Seamaster Planet Ocean “Deep Black” GMT

Omega - 215.92.46.22.01.002 · $6,495

The Omega Seamaster Planet Ocean “Deep Black” GMT is a bold, modern tool watch that combines serious dive capability with true dual-time functionality.

Condition: Very Good, pre-owned – light wear consistent with careful use
Water Resistance: 600m
Movement: Omega’s Master Chronometer GMT movement (Cal. 8906)
Depth Rating: 600m water resistance

Posted at

Apr 2, 2026, 11:12 PM

Active

View listing on r/WatchExchange