The Halios Seaforth IV is a 40 mm watch from the Seaforth collection. Its titanium case is 12.4 mm thick and 46.5 mm from lug to lug, with 20 mm lugs. It is water resistant to 200 m. The crystal is sapphire (double-domed).

The manufacturer’s list price is US$765. It comes in 6 versions, with blue, pink, grey and yellow dials.