Omega Seamaster Diver 300M Co-Axial Master Chronometer Chronograph — Ref. 210.30.44.51.06.001

Video footage available upon request. Open to offers. Bracelet sizing service available.


The Seamaster Diver 300M Chronograph is one of Omega's most capable tool watches — a full-size 44mm chronograph built for serious water resistance without sacrificing wrist presence or finishing. The grey ceramic dial paired with the blue ceramic bezel gives this reference a distinctive, versatile look that sets it apart from the more common black and blue variants. Powered by the in-house Caliber 9900 — Omega's first chronograph movement to earn METAS Master Chronometer certification — this watch is anti-magnetic to 15,000 gauss, COSC-certified, and equipped with a column wheel and vertical clutch for smooth chronograph operation. With a helium escape valve at 10 o'clock and 300 meters of water resistance, it's built to go anywhere.


Specifications

• Model: Seamaster Diver 300M Co-Axial Master Chronometer Chronograph
• Reference: 210.30.44.51.06.001
• Caliber: Omega 9900 — 54 jewels, 28,800 vph (4 Hz), METAS Master Chronometer
• Case Material: Stainless Steel
• Case Diameter: 44mm
• Case Thickness: 17.20mm
• Bezel: Blue ceramic, unidirectional rotating (dive scale)
• Crown: Screw-down with helium escape valve at 10 o'clock
• Crystal: Sapphire
• Caseback: Exhibition display
• Dial: Grey ceramic with luminous applied index markers and sword hands
• Bracelet: Stainless steel with diver extension
• Clasp: Folding clasp with diver extension
• Movement: Automatic
• Power Reserve: 60 hours
• Water Resistance: 300 meters
• Functions: Hours, minutes, small seconds, date (6 o'clock), chronograph — 12-hour counter (3 o'clock), 60-minute counter (9 o'clock)

Condition Report

• Case: 10/10
• Bezel: 10/10
• Crystal: 10/10
• Dial/Hands: 10/10
• Bracelet: 10/10
• Clasp: 10/10
• Caseback: 10/10

Polishing Status: Unpolished
Photos taken on full bracelet links, fitting approximately a 20cm (8 inch) wrist.


Delivery Contents

• Complete set — box, papers, warranty card, pictogram card, manuals
• Full bracelet links included

Please refer to photos for full contents.


Service & Authenticity

• Timegrapher: 316 amplitude
• Service History: No known service history
• Warranty: Active — card dated April 2023, covered through April 2028 (Omega 5-year warranty)

Shipping & Legal

• Based in: Cullman, AL
• We serve buyers in Nashville, Atlanta, and Memphis — insured shipping or in-person meetup available.
• Shipping: Fully insured overnight with tracking provided
• Shipping within CONUS only
• Buyers are responsible for any applicable taxes and duties
• Watch is sold in accordance with United States laws and regulations

All watches are inspected by our watchmakers for condition, authenticity, and functionality before sale. Feel free to reach out via messenger with any questions.