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How to Choose Your Omega Watch
OMEGA organizes its catalogue into four main families: the Speedmaster collection (chronographs), Seamaster watches (diving and versatile watches), the Constellation collection, and De Ville watches (dress watches). Four practical criteria can help you find your way around the collection.
Your wrist size. The case diameters of the stainless steel models range from 38 mm (Aqua Terra, Railmaster, Speedmaster 38) to 42 mm (Speedmaster Moonwatch Professional, Seamaster Diver 300M, Planet Ocean 600M). On a slender wrist, a 38 mm case remains well proportioned. On a larger wrist, a 42 mm case feels naturally balanced. Thickness is also worth considering: an automatic chronograph such as the Speedmaster 38 measures 14.75 mm, compared with 13.79 mm for the new Planet Ocean.
Your intended use. For diving or sailing, the Diver 300M (water-resistant to 300 metres) and the Planet Ocean watch (600 metres) feature a unidirectional rotating bezel. For everyday wear that includes swimming, the Seamaster Aqua Terra and Railmaster watches are water-resistant to 150 metres. The OMEGA Speedmaster Moonwatch, water-resistant to 50 metres, is better suited to land-based use.
The winding system. The Speedmaster Moonwatch Professional uses the hand-wound calibre 3861: it is wound via the crown. Most of the other models are self-winding and wind themselves while being worn.
The style. Choosing between a chronograph watch (Speedmaster), a tool watch (Seamaster), or a dress watch (Constellation, De Ville) depends above all on what you wear on a daily basis.
Most current OMEGA calibres are certified as Master Chronometers by the Swiss Federal Institute of Metrology (METAS), with resistance to magnetic fields of up to 15,000 gauss.
Which Watch for Which Profile?
If you dive or sail → Seamaster Diver 300M or Planet Ocean 600M.
If you are looking for a watch for both the office and the beach → Seamaster Aqua Terra.
If you want a chronograph → Speedmaster Moonwatch (42 mm) or Speedmaster 38.
If you favour a dressier style → Constellation or De Ville.
If you prefer a vintage-inspired, date-free dial → Railmaster.
FAQ
What is the difference between the Seamaster Diver 300M and the Planet Ocean?
The Diver 300M is water-resistant to 300 metres and is recognizable by its engraved wave-pattern dial. The Planet Ocean is water-resistant to 600 metres. Its fourth generation, launched in 2025, measures 42 mm in diameter and 13.79 mm in thickness, and uses the calibre 8912, with a 60-hour power reserve.
Does an Omega watch need to be wound?
Automatic models wind themselves while being worn. After a few days without wearing the watch, it will stop and can be restarted by turning the crown. The Speedmaster Moonwatch Professional, however, is an OMEGA hand-wound watch: it needs to be wound regularly, ideally at the same time every day.
What does Master Chronometer certification mean?
It is awarded by METAS following a series of tests carried out on the complete watch. It certifies accuracy of between 0 and +5 seconds per day, resistance to magnetic fields of up to 15,000 gauss, as well as water resistance and power reserve.
Which Omega watch is best suited to a slender wrist?
Three collections offer a 38 mm stainless steel case: the Aqua Terra, Railmaster and Speedmaster 38. The Aqua Terra and Railmaster are three-hand watches with slimmer profiles. The Speedmaster 38 is an automatic chronograph and sits higher on the wrist (14.75 mm).
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