The Alpina Seastrong is a diving watch with a unidirectional rotating bezel in four colours and water-resistant equipment up to 300 metres (30 ATM). The 2016 luxury watch features an AL-525 calibre automatic movement and the 2017 edition is equipped with a Sellita SW 200 automatic movement. Apart from a modern rubber strap for the new edition, the other features are identical: a 44 mm case, a transparent case back and a screwed-in crown. The dial has luminous hour-markers. A date window is at 3 o'clock. The diving watch is an entry level diving watch in the luxury segment with all important functions for divers.