Omega resurfaces with a renewed vision of the Seamaster Planet Ocean two decades after the modern-day dive icon first descended into the watery depths. Instead of simply updating a classic with cosmetic changes, however, the Biel/Bienne manufacture reimagines the fourth-generation Seamaster Planet Ocean’s all-around construction. Architecturally, the case proportions and design, as well as the bracelet and dial display, are refined. At the same time, further technical updates underscore Omega’s prowess in cutting-edge technologies and innovations. A lineage of bold colours, unwavering 600m deepsea functionality and pioneering confidence form the trifecta of the emblematic Seamaster Planet Ocean. Now with seven new Co-Axial Master Chronometer models, Omega writes a new chapter in a story two decades in the making.

The Fourth Generation Evolution

Omega unveiled its most radical take yet on the Seamaster Planet Ocean as part of its fourth-generation evolution, and the differences are apparent from the get-go. Instead of referencing the Seamaster 300 of the 1960s, Omega sought inspiration from 1980s and 1990s Seamaster watches for this collection. One of the big revamps sees the overall case dimension streamlined, while pronounced case lines reveal sharp and distinct bevelled edges across the watch.

To accommodate the refreshed case design, Omega presented an integrated bracelet construction that allows the case and bracelet lines to flow seamlessly. A series of slimmer, flat bracelet links with two brushed outer rows and one central polished row has been optimised for wearing comfort. The case diameter comes in at 42mm, similar to that of the 2005 Seamaster Planet Ocean, while the thickness has been dramatically reduced to 13.79mm, down from 16.1mm of the standard third-generation models. A new two-part case structure omits the collection’s defining helium escape valve in favour of an inner titanium ring that debuted on the Seamaster Planet Ocean Ultra Deep. The innovation provides the material strength required to seal the Seamaster Planet Ocean when diving to depths of up to 600 metres. A screw-in Grade 5 Titanium caseback offers additional security.

Aesthetically, the new Seamaster Planet Ocean has retained the signature arrowhands and is paired with a new Arabic numeral typography. The numerals are slightly openworked, a throwback to the original Planet Ocean font, and squared to match the watch case and bracelet. At launch, Omega unveiled three broad models characterised by ceramic bezel colours: orange, blue and black. The orange model is available in either a stainless steel bracelet, a black rubber strap, or an orange rubber strap, while the latter two colours are available in a stainless steel bracelet or a rubber strap in their corresponding colour.

All fourth-generation Seamaster Planet Ocean watches are powered by the Omega Co-Axial Master Chronometer Calibre 8912, which has previously been used in the Seamaster Planet Ocean Ultra Deep models. The self-winding movement offers 60 hours of power reserve and meets the highest standards of precision, performance and magnetic resistance, as approved by the Swiss Federal Institute of Metrology (METAS). While some may view these changes as a drastic overhaul, beneath the rebalancing act and technical fortifications beats the same ocean-bound spirit that has defined the Seamaster Planet Ocean collection since 2005.

A Brief History of the Seamaster Planet Ocean

Omega’s diving heritage began in 1932 with the release of the Marine, known as the world’s first watch for civilian divers. That ingenious timepiece was the beginning of an underwater legacy that continued through the 1950s, 1960s and 1970s, with revolutionary creations, such as the Seamaster 300, the Seamaster 1000, and the PloProf.

Omega Marine advert circa 1937

In the 1990s, OMEGA again pushed the boundaries of dive watch design, returning with the now-iconic Seamaster Diver 300M, which remains one of the brand’s signature collections. With each new creation, OMEGA has built upon its reputation as a master of diving watches and gained the trust of generations of ocean explorers, pioneers and scientists.

Omega Automatic Seamaster 1000m circa 1971

The 2005 Seamaster Planet Ocean is an archival throwback to Omega’s archive books, drawing inspiration from one of Omega’s most important dive creations, the Seamaster 300 of the late 1950s and early 1960s. Some of the Seamaster 300’s yesteryear features that were carried over into the contemporary Seamaster Planet Ocean include a highly legible black dial with quarter-hour Arabic numerals, arrowhead hands, and a diving-scale bezel with an inner ring.

Omega 120 PloProf

However, the biggest achievement of the Seamaster Planet Ocean lies in its depth rating as it was engineered to 600 metres — double that of the Omega flagship Seamaster Diver 300M. Liquidmetal™ technology made its debut in watchmaking in 2009, introduced in the Seamaster Planet Ocean collection. The amorphous alloy consisting of titanium, zirconium and copper is bonded with ceramics, offering superior scratch resistance and stability. During the fusion process, the liquid metal fuses at a temperature half that of conventional titanium alloys, yet upon cooling, it yields properties three times as tough as stainless steel. The breakthrough opened new aesthetic and technical avenues for Omega.

Omega Seamaster 300 advert circa 1965

The second evolution arrived in 2011, ushering in a suite of modern refinements that included full ceramic bezels and glossy dials. However, the most notable advancement came via the adoption of the Calibre 8500 that featured the Silicon Si14 balance spring. It marked the beginning of Omega’s foray into extreme magnetic resistance that would later change and reinforce the landscape of Omega’s technical ambitions. Sandwiched between the second and third generation evolutions is the Seamaster Planet Ocean’s signature orange bezels forged entirely from ceramic. Omega’s success in achieving the vivid colour that had long eluded the watch industry came in 2014; previous bezels were rendered exclusively in aluminium.

Liquidmetal™ technology

By 2016, the third-generation Seamaster Planet Ocean carried the baton deeper into the future. Armed with Omega’s swanky Co-Axial Master Chronometer movements, the lineup conformed to the highest Swiss standards of chronometry and magnetic resistance. Cosmetically, slimmer cases, new sizes and fresh materials, such as the debut of 18k Sedna™ Gold, refined the collection’s rough-and-tough aesthetics.

Then came Omega’s push into extremities with the Seamaster Planet Ocean Ultra Deep and the use of the proprietary O-MEGASTEEL alloy. After conquering the Challenger Deep in 2019, the technology was commercialised in 2022. On the watch dial, the certified water resistance is a mind-boggling 6,000 metres, encapsulating Omega’s most extreme engineering feats to date. Omega’s confidence in its creation was exemplified by genuine ocean test conditions 6,269 metres deep into the Mariana Trench in 2021.

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