It\u2019s been 60 years since Seiko<\/a> introduced Japan\u2019s first dive watch<\/a>. Over the six decades that followed the debut, the watchmaker has continued to push the boundaries of what could be expected from these dynamic timepieces. Increased concentration on safety and reliability helped the brand build an immense following of its underwater tickers that today is represented by its Prospex collection.<\/p>\n Now, with its 60th anniversary finally here, Seiko is commemorating the milestone with the addition of three new watches<\/a> into the series: the Marinemaster, as well as the silver-dialed homage to their 1965 diver\u2019s watch and a blue-dialed version made to reflect the design of their 1968 diver\u2019s watch.<\/p>\n <\/a> Courtesy Image<\/p>\n<\/div>\n<\/figcaption><\/figure>\n The Marinemaster\u00a0SLA081\u00a0<\/em>may be the most-impressive of the bunch, though, featuring everything from a new Caliber 8L45 mechanical watch movement, a one-piece titanium case that\u2019s water resistant up to 600 meters, and a stainless-steel bezel that\u2019s been treated with diamond-like carbon coating made to be scratch resistant.<\/p>\n The Caliber 8L45 movement uses Seiko\u2019s proprietary titanium alloy, Spron, which was designed for durability against breakage, rust, and wear. It also provides 72 hours of power reserve and operates within a tolerance of +10 to -5 seconds per day.<\/p>\n The case features the word “PROFESSIONAL” inscribed across the dial, while a specially developed L-shaped gasket prevents helium infiltration, eliminating the need for an escape valve.<\/p>\n