REFERENCE: 215.30.46.51.01.001
CONDITION: Excellent condition with original box, papers and original purchase receipt
GUARANTEE DATED: Apr 2023
MATERIAL: 316L steel
DIAL: Black
BRACELET: Stainless steel bracelet
DIAMETER: 45.5mm
BEZEL: Ceramic
CROWN: Screwdown crown
CRYSTAL: Domed scratch-resistant sapphire with double sided anti-reflective treatment
WATER RESISTANCE: Water resistant to 600m
MOVEMENT: OMEGA Co-Axial Master Chronometer Calibre 9900
ACCURACY: 0/+5 seconds per day
POWER RESERVE: 60 hours
CLASP: Foldover clasp with comfort setting and diver extension
The OMEGA Seamaster Planet Ocean 600M Chronograph represents the pinnacle of professional diving chronograph technology, combining exceptional 600 metre water resistance with Master Chronometer certified precision. This imposing 45.5mm timepiece features a black ceramic dial with bold Arabic numerals and an innovative single subdial design that consolidates the 60 minute and 12 hour counters for intuitive elapsed time reading. The black ceramic unidirectional bezel with Liquidmetal™ diving scale ensures permanent legibility of critical timing functions, while maintaining the scratch resistance demanded by professional diving applications.
At the heart of this ocean going chronograph beats the Master Chronometer Calibre 9900, certified by METAS to withstand magnetic fields exceeding 15,000 gauss while maintaining chronometric precision. The column wheel chronograph mechanism delivers smooth operation of timing functions, while the Co-Axial escapement and silicon balance spring ensure long term reliability under extreme conditions. The robust stainless steel case features a helium escape valve for saturation diving, complemented by a steel bracelet with patented extendable foldover clasp that adjusts easily over diving suits.
Condition: Excellent condition
Includes: Complete box set and original purchase receipt
Guarantee: Warranty valid until 2028
Shipping: Free UK delivery
Launched in 2005, the Planet Ocean collection emerged from OMEGA’s desire to create the ultimate professional diving watch, pushing beyond the 300 metre specification that had defined the Seamaster line since 1957. The collection drew inspiration from OMEGA’s ocean exploration heritage, particularly the Seamaster 600 “PloProf” developed for professional saturation divers in 1970. The Planet Ocean modernised these extreme diving capabilities while creating more wearable proportions suitable for daily use.
The chronograph variant adds crucial functionality for professional applications where precise timing proves essential, from decompression stops to underwater navigation. The innovative single subdial design, consolidating both elapsed hours and minutes, demonstrates OMEGA’s commitment to improving functionality rather than simply adding complications. This user focused approach reflects genuine understanding of how chronographs function in challenging underwater environments where quick glance readability can prove vital.
The Master Chronometer certification elevates the Planet Ocean beyond typical dive watches, providing laboratory verified performance that exceeds industry standards. The combination of extreme water resistance, professional chronograph functionality, and anti-magnetic protection creates a timepiece capable of performing in environments that would compromise lesser watches, from deep ocean exploration to industrial diving applications.
The 600 metre water resistance provides exceptional safety margin that translates into superior reliability during all water activities, not just extreme diving. This over engineering means the watch easily handles swimming, snorkelling, recreational diving, and water sports without approaching its limits. The robust case construction required for such ratings also provides superior protection against impacts, pressure changes during flights, and general daily abuse that would damage less capable watches.
The professional specification creates confidence that extends beyond water activities, as the same engineering that enables deep diving ensures the watch performs flawlessly in challenging conditions. The helium escape valve, while unnecessary for recreational diving, demonstrates the no compromise approach to construction. This peace of mind proves valuable for active lifestyles where watches face unpredictable challenges, from beach holidays to unexpected rain exposure.
The consolidated 60 minute and 12 hour counter represents a significant advancement in chronograph legibility, addressing the common confusion of reading multiple subdials during time critical operations. Traditional chronographs require users to check separate registers for elapsed hours and minutes, potentially causing errors when quick readings prove essential. The Planet Ocean’s single subdial displays both functions concentrically, allowing immediate comprehension of total elapsed time from one location.
This design particularly benefits diving applications where narcosis or limited visibility might impair cognitive function. The larger subdial size possible with single register design improves readability, while the freed space at 6 o’clock accommodates the date window without crowding. The engineering required to achieve this consolidation demonstrates OMEGA’s technical capability, as the movement architecture must coordinate multiple timing trains into unified display.
Master Chronometer certification through METAS represents the industry’s most comprehensive performance verification, testing complete watches rather than just movements under real world conditions. Beyond basic chronometer precision, METAS evaluates magnetic resistance to 15,000 gauss, water resistance, power reserve accuracy, and consistent performance across temperature variations. Each watch undergoes individual testing for over a week, ensuring every piece meets these exceptional standards.
The magnetic resistance testing proves particularly relevant for modern life, where powerful magnets in electronic devices, medical equipment, and security systems can magnetise traditional watches. The certification also verifies the watch maintains precision after magnetic exposure, ensuring long term reliability. This comprehensive approach provides objective third party validation that exceeds manufacturer claims, giving buyers confidence in their investment.
Liquidmetal™ represents a revolutionary bezel manufacturing technology where amorphous metal alloy in liquid state fills precisely engraved channels in the ceramic bezel insert. Upon cooling, this material bonds at the molecular level with the ceramic, creating numerals and markings that become integral to the bezel rather than surface applications. This process produces perfectly smooth transitions between materials with no gaps or irregularities.
The technology ensures diving scale markings remain permanently legible throughout the watch’s lifetime, critical for timing applications where faded markings could prove dangerous. Unlike painted scales that chip or fade, or separate metal inserts that might detach, Liquidmetal™ maintains perfect definition indefinitely. The seamless integration also prevents contamination buildup in gaps, maintaining cleaner appearance with less maintenance while demonstrating OMEGA’s leadership in advanced materials.
The helium escape valve addresses a specific challenge in professional saturation diving, where divers breathe gas mixtures containing helium in pressurised environments. Helium molecules, being extremely small, penetrate watch cases during extended pressure exposure. During decompression, expanding helium inside the watch can create pressure differentials that literally blow off crystals or casebacks. The escape valve automatically releases this pressure, protecting the watch during ascent.
While recreational divers never encounter situations requiring helium escape valves, its presence indicates construction capable of handling extreme professional applications. The valve’s integration requires additional case complexity and potential failure points, yet OMEGA includes it to ensure the Planet Ocean serves genuine professional needs. This commitment to functional completeness rather than marketing specifications demonstrates the difference between lifestyle watches with diving aesthetics and genuine professional instruments.
The 45.5mm diameter reflects the Planet Ocean Chronograph‘s professional tool watch purpose, providing sufficient real estate for optimal legibility of multiple functions while accommodating the robust construction required for 600 metre water resistance. The larger dial area allows bold Arabic numerals and substantial hands that remain readable in challenging conditions, while the consolidated subdial design prevents the cluttered appearance that affects smaller chronographs.
The substantial case size also provides necessary internal volume for the complex Master Chronometer movement with integrated chronograph, while maintaining proportions that feel balanced on the wrist despite significant 18.9mm thickness. The 52.3mm lug to lug distance remains manageable for most wrists, while the curved lugs and ergonomic crown placement enhance wearing comfort. This sizing represents purposeful design rather than arbitrary enlargement, creating a professional instrument that prioritises functionality.
For any purchases online, we offer a 14 day refund as long as they are returned exactly as sold. Any purchases in person are final.
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