Omega Seamaster Diver 300m Seamaster Diver 300M Master Co-Axial 42 Stainless Steel / Summer Blue / Bracelet
Reference 210.30.42.20.03.003
About this watch
The Omega Seamaster Diver 300M Master Co-Axial 42 is a masterpiece of engineering and design, blending elegance with robust functionality. Its stunning summer blue dial features a gradient finish, adding depth and character to the watch face. The case is crafted from stainless steel and ceramic, built to withstand underwater adventures. A rotating bezel allows for accurate dive time tracking, and a water resistance of up to 300 meters ensures it can endure ocean depths. At its heart lies the Omega caliber 8800 movement, a marvel of engineering with Co-Axial escapement, reducing friction and enhancing longevity and accuracy. Rigorously tested according to Master Chronometer certification, this watch is resistant to magnetic fields reaching 15,000 gauss and has a power reserve of 55 hours. The Seamaster Diver 300M comes with a stainless steel bracelet that complements the watch's aesthetics while providing a comfortable fit. Its versatility makes it suitable for various environments, from diving to formal events.
Key Features
- Stainless Steel and Ceramic Case
- Summer Blue Gradient Dial
- Omega Caliber 8800 Movement
- 300m Water Resistance
- Co-Axial Escapement
- Master Chronometer Certified
- 55 Hour Power Reserve
Specifications
- Brand
- Omega
- Family
- Seamaster Diver 300m
- Model
- Seamaster Diver 300M Master Co-Axial 42 Stainless Steel / Summer Blue / Bracelet
- Reference
- 210.30.42.20.03.003
- Movement
- 8800
- Movement Features
-
- Hours, Minutes, Seconds
- Date
- Chronometer, Co-Axial Escapement
- Case
- 42mm
- Dial Color
- Blue
- Crystal
- Sapphire
- Water Resistance
- 300
Current Listings

Omega Seamaster 300M - Summer Blue - 42mm - 210.30.42.20.03.003 ( new / 2024 )
This Omega Seamaster 300M 42mm features a Summer Blue dial on a stainless steel bracelet, powered by the Master Co-Axial movement.
- Condition: Brand new
- Case size: 42mm
- Movement type: Master Co-Axial

Omega Seamaster 300M - Summer Blue - 42mm - 210.30.42.20.03.003 ( mint )
Up for sale is a mint condition Omega Seamaster 300M 42mm Summer Blue Dial on Bracelet, complete with all boxes, papers, booklets, hang tag and Omega Warranty Card.
- Condition: Mint Condition
- Case size: 42mm
- Movement type: 8800 Master Co-Axial
- Shipping cost international: 150

Omega Seamaster Diver 30mm Summer Blue 210.30.42.20.03.003
This Omega Seamaster Diver features a 42mm steel case, blue ceramic bezel, and ceramic blue dial.
- Condition: Perfect condition
- Case Size: 42mm diameter
- Water Resistance: 300m (1000ft)
- Movement: Omega 8800 self-winding movement
Omega Seamaster Diver 300m Summer Blue 210.30.42.20.03.003
This Omega Seamaster Diver 300m features a Summer Blue Dial and comes in great shape, showing only minor hairlines.
- Condition: mint condition
- Depth rating: 300m

Omega Seamaster 300M SS 42MM Diver Summer Blue Wave Dial 210.30.42.20.03.003 B
Up for sale is an Omega Seamaster 300M SS 42MM Diver Summer Blue Wave Dial, in excellent condition. The timepiece includes various accessories such as the inner and outer box, booklet, serial hang tag, pictogram card, master chronometer card, and international Omega warranty card.
- Condition: Excellent
- Case Size: 42mm
- Material: Stainless Steel

Omega Seamaster 300M - Summer Blue - 42mm - 210.30.42.20.03.003 ( new / 2024 )
This Omega Seamaster 300M 42mm Summer Blue Dial is a brand new watch with all original boxes, papers, and accessories.
- Condition: Brand new
- Case material: Stainless steel
- Movement: 8800 Master Co-Axial
![[WTS] Omega SMP300 Summer Blue 210.30.42.20.03.003 SMP 300 Seamaster](https://preview.redd.it/qyb2ssfixy5f1.jpg?width=640&crop=smart&auto=webp&s=990378c1c237ee2feab10205371ba4d750de4e40)
Omega SMP300 Summer Blue 210.30.42.20.03.003 SMP 300 Seamaster
For sale is my second favorite seamaster dial ever, a Summer Blue 300M on bracelet with full boxes and cards.
- Condition: AD unit, bracelet mint
- Box Contents: full boxes (including special edition summer blue outer box) all cards including Omega Boutique warranty card, certificate of appraisal
- Shipping Options: insured, signature required shipping in the US
- Available Meetups: Chicago or Milwaukee area
![[WTS] Omega Seamaster Diver 300M Green w/ Box & Papers + Additional Forstner Bracelets](https://external-preview.redd.it/Eh_wYdCnW34bVRAGoXdpGbIYCOEIKgEkuxqR5q_Abfg.jpeg?auto=webp&s=20b31440dac4c888dab218e35b445653164bc791)
Omega Seamaster Diver 300M Green w/ Box & Papers + Additional Forstner Bracelets
This Omega Seamaster Diver 300M in Green features a 42mm case diameter, 13.6mm thickness, and is water resistant to 300m/1,000ft. It comes with an Omega 8800 Co-Axial Master Chronometer movement and automatic winding.
- Condition: Great overall condition, minor scratches consistent with regular wear
- Case diameter: 42 mm
- Thickness: 13.6 mm
- Lug width: 20 mm
![[WTS] Omega Seamaster Diver 300M Ceramic and Sedna Gold – Full Set, Excellent Condition (2023 AD Purchase) 🌊](https://external-preview.redd.it/_S_LBL-Ia8It5C0WbvDRA_PgCuf3eNQAVIW1IJlV3s8.jpeg?auto=webp&s=57590fff305cbdde5fd108f72b7adf7bcc925e15)
Omega Seamaster Diver 300M Ceramic and Sedna Gold – Full Set, Excellent Condition (2023 AD Purchase) 🌊
The Omega Seamaster Diver 300M features a distinctive 18K Sedna gold and black ceramic construction, with a 44mm case diameter, black ceramic dial, and unidirectional rotating bezel.
- Condition: Excellent condition
- Case Size: 44mm
- Material Case: ceramic
- Dial Color: black