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The Maratac 500M Alto Mare is a 42mm titanium dive watch with a true GMT complication, built around the Miyota 9075 automatic movement. It carries a 500m water-resistance rating and ships with both a titanium bracelet and a titanium Mil-Series strap. It suits travelers and divers who want a lightweight, high-spec tool watch without paying Swiss-brand money. Against rivals like the Seiko Prospex GMT or Swiss GMT divers, it offers more water resistance and a titanium case at a fraction of the outlay, though it comes from a small brand with limited service support.
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Lowest price we've seen: $895.00 on Nov 13 at CountyComm. Tracked across 1 store since Nov 13.
Owners rate it very highly, praising the titanium build, the true GMT function and the value against Swiss and Japanese alternatives. Complaints are few and mostly concern availability and the softer feel of titanium.
The 500M Alto Mare 42mm 9075 GMT is an automatic titanium watch from Maratac. It is powered by a MIYOTA 9075 24-jewel hacking movement with True GMT function, so the hour hand adjusts independently for changing time zones. The power reserve is 42 hours.
It has two bezels. The inner GMT bezel ring tracks an additional time zone and is set with the True GMT hour hand. The outer timing bezel rotates to track elapsed time or a secondary time zone. The outer bezel is ceramic, bidirectional and screw-down locking, and it is infused with Super-LumiNova.
The watch is rated to 500 meters (1650 feet) and has an automatic helium escape valve. It has a domed 3.5mm sapphire crystal. The hands and timing chapter use Day Glow, with Super-LumiNova Swiss Grade X1 Triple Applied C3 for low-light legibility. The Grade 5 titanium double-lock bracelet has screw links and solid milled end links. When removing screws to adjust the bracelet, use Threadlocker 242 Removable Loctite.
