A while back, our editors went 11 feet under water to test various divers’ watches for legibility, ease of use, and toughness in actual diving conditions. One of these watches, all of whose test results were revealed in WatchTime’s December 2012 issue, was the Citizen Promaster 1000 M Professional Diver.
The Promaster 1000 M Professional Diver has a 47.5-mm titanium case which, as the watch’s name implies, is water resistant to 1,000 meters. Not only is this a very large and robust divers’ watch, it’s also a dream come true for weekend divers. When you open the Promaster’s large leather box, the first thing you’ll notice is a long, extra strap attached to a pronged buckle. This extension can be easily buckled between the two ends of the watch’s solid yet elastic rubber strap. Thanks to this practical item, this Citizen dive watch can truly adapt to wrists and diving suits of all sizes. This makes the Promaster the only watch that’s suitable for diving in very cold water, when you must wear a thick wetsuit.
The leather box also contains a spare circular spring for the bezel’s retention system, which you can insert after the original spring wears out after many years. To install it, you must first open the lever on the left side of the case. (The large screwed crown is also on this side, where it’s less likely to press against your wrist.) You then exert firm pressure with your fingers to turn and open the case’s outer ring. Finally, you remove the rotating bezel and exchange the old circular spring for a new one. Download the full review here.