The JP2007-17X is a LIMITED EDITION of the Promaster Aqualand I — Citizen’s legendary analogue-digital dive computer that traces its lineage back to the mid-1980s as the world’s first diver’s watch with an electronic depth sensor. This edition features a green dial paired with a grey IP-finished stainless steel case and a matching grey IP knurled unidirectional rotating bezel, giving it a stealthy, modern character. At its core is the quartz Calibre C520 with an integrated depth sensor capable of measuring from 1 to 80 metres in 10 cm increments. The watch automatically enters dive mode upon submersion and records data for up to four consecutive dives — including date, start time, end time, maximum depth and dive duration — all of which can be recalled afterwards. Four separate dive alarms cover depth, dive time, rapid ascent and abnormal depth warnings, providing a genuine layer of safety underwater. Beyond the dive computer functions, the C520 offers a 1/100-second chronograph with split time, a complete calendar with day and date, an alarm and a battery charge indicator. The green dial with high-visibility luminescent hands and indices ensures legibility in all conditions, protected by mineral glass. The watch is ISO 6425 certified for professional diving with 200-metre water resistance. Delivered on a black polyurethane strap in a classic accordion format with an extender for use over a wetsuit. Basic Information Case size (Ø × H): 44 × 15 mm (approx.) Case material: Stainless steel with grey IP finish Band: Black polyurethane strap (accordion format) with extender for wetsuit use, pin buckle Construction: ISO 6425 Professional Diver certified Water resistance: 200-metre water resistance (20 bar) Power supply and battery life: Quartz, Calibre C520 (analogue-digital with depth sensor) Exterior Glass: Mineral glass Bezel: Unidirectional rotating bezel with grey IP finish, knurled grip Crown: Screw-down crown Other: Luminescent hands and indices, Depth sensor on case side, Screw-down caseback Watch Features Depth measurement: Electronic depth sensor measuring from 1 to 80 m (in 10 cm increments), Auto-start dive mode upon submersion Dive data memory: Stores data from the last 4 dives — dive date (month, day), start time (hour, minute), end time (hour, minute), maximum depth, dive duration Dive alarms: Depth alarm, Dive time alarm, Rapid ascent alarm, Abnormal depth alarm Chronograph: 1/100-second chronograph with split time detection Calendar: Complete calendar (day and date) Alarm: Daily alarm Other features: Battery charge indicator, Dive alarm controller, AM/PM display Regular timekeeping: Analogue-digital: Hours, minutes, seconds, AM/PM, day, date
