Citizen celebrates the 30th anniversary of Pro-Rost and collects professional-quality sports watches that appeal to everyday adventurers. In hindsight, Citizen reviewed their rich history of innovation in timing. Inspired by great adventures, Promaster offers the highest level of functionality and endurance in all categories, whether in the air, on land or at sea. The introduction of the most accurate times in the world is to control the limited edition 0100 in less than 1 second. Using an AT-sized crystal oscillator instead of a traditional pitched crystal oscillator, this one-second measurement of movement is more accurate than other watches. The limited edition Promaster Aqualand is a 200m diving watch with a Super TianiumTM case, a black polyurethane strap, a MRK raised gold accent, multi-colored light markers for improved visibility and an indicator of 0 to 40 meters above sea level to facilitate visibility and dynamic movement.