Omega Seamaster

Omega Seamaster is the Swiss brand's collection of sports and diving watches, and the longest-running of its current lines. The first Seamasters appeared in 1948 as water-resistant civilian watches for everyday wear, their sealed cases relying on solutions developed during the Second World War. The series became a professional diving instrument in 1957 with the Seamaster 300; the Diver 300M line followed in 1993 and the first-generation Planet Ocean in 2005.

The key choice is the line and the depth the watch is built for. The Seamaster Diver 300M is rated to 300 metres, with its wave-pattern dial and helium escape valve as signatures. The Planet Ocean is rated to 600 metres and the Planet Ocean Ultra Deep to 6,000: this series builds on the watches that reached the bottom of the Mariana Trench in 2019 during the Five Deeps expedition. The vintage look lives on in the Seamaster 300 and the Seamaster 1948 – the former in a 41 mm case, the latter in 38 mm with small seconds on a leather strap. The urban branch, with no rotating bezel and 150 metres of water resistance, is the Seamaster Aqua Terra, which has its own collection page.

Most models are men's watches, with case sizes from 29 to 45.5 mm; besides the date, there are chronographs and second time zone models. Earlier generations include the Seamaster Professional 300M, such as the Electric Blue Quartz and the Diver Apnea with a freediving timer. The Seamaster Chronometer NZL-32 regatta chronograph stands apart.