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The SLA079 is Seiko's modern re-interpretation of the 1968 Marine Master, a 300m diver's watch built around the 8L35 automatic movement. It pairs a 42.6mm stainless steel case with a dual-curved sapphire crystal, LumiBrite on the hands, markers and bezel, and a screw-down crown for serious water use. The 8L35 is a step above the 6R35 found in cheaper Prospex divers, with a tighter +15/-10 seconds per day rating and about 50 hours of reserve. It suits divers and collectors who want a rugged, no-nonsense tool watch rather than a slim desk diver, and it competes with Swiss divers that cost far more for similar specs.
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Owners treat the SLA079 as a proper tool watch: they praise the build, the lume and the 8L35's smooth winding and long reserve. The main complaints are its size and weight and the fact that the movement's accuracy, while good, is not chronometer-certified.
The Seiko Prospex SLA079 Marine Master 1968 Re-Interpretation 300 is an automatic diver's watch with a black dial. It has a 42.6 mm stainless steel case with a unidirectional rotating bezel, a screw-down crown and a screw case back. It is water resistant to 300 m (1000 ft).
Inside is the 8L35 automatic movement, which can also be wound by hand. It beats at 28,800 vibrations per hour and has a power reserve of approx. 50 hours. The dial shows the date and has a stop second hand function. LumiBrite is applied to the hands, the indexes and the bezel.
The dual-curved sapphire crystal has an anti-reflective coating on its inner surface. The watch is secured with a three-fold clasp with a secure lock, a push button release and an extender.
