Vintage Citizen Promaster Aqualand C023-089405
This is the vintage 1990's Citizen Promaster Aqualand, a legendary professional diver's watch C023-089405 model.
Ana-Digi Display: Combines a traditional analog three-hand set with a digital LCD window at the top.
Depth Sensor: The large protrusion on the left side of the case is an electronic depth sensor, which was revolutionary for dive watches when first released.
Two-Tone Aesthetic: The gold-tone bezel, pushers, and crown indicate this is a "two-tone" variant, often associated with the modern JP2004 reissue styling.
Full Lume Dial: The cream-colored face is a "lumibrite" or full-lume dial, designed to glow entirely in dark underwater environments.
Promaster Logo: The "arrow" or "windrose" logo at the center is the hallmark of Citizen's professional-grade sports line.
Water Resistance: Rated to 200 meters (666 feet) or 20 bar
Case Construction: Stainless steel with a screw-down crown at the 4:00 position for analog time setting.
Bezel: Unidirectional, 60-click elapsed time bezel.
Power Source: The original C023 movement typically required three 371 silver oxide batteries to power its diverse electronic functions.
Electronic Depth Meter: Provides constant measurement up to 80 meters (260 feet).
Dive Meter System: Automatically begins measurement when the user reaches a depth of 1 meter (3 feet).
Memory/Logs: Stores maximum depth reached and total dive time.
Rapid Ascent Alarm: Alerts the diver if they ascend faster than 1.5 meters per 10 seconds.
Chronograph: 1/100th second stopwatch measuring up to 59 minutes and 59 seconds.
Daily Alarm: Digital alarm with an "on/off" indicator.
Time Display: Features a 12/24 hour switching function
Calendar: Digital date and day display.
Buttons: Three main pushers labeled "Mode," "Select," and "Set" control the digital interface.
Depth Sensor: Located on the left side of the case, it utilizes a metal membrane and piezoelectric sensor to convert water pressure into depth data.
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Sold: 825.00
Date: 5/8/2026
Website: Twenty Four Hour Mall
As a vintage dive watch enthusiast, I find the Citizen Promaster Aqualand C023-089405 a fascinating timepiece that seamlessly blends functionality and style. The integration of an electronic depth sensor on the left side of the case was groundbreaking during the 1990s — this sensor uses a metal membrane and piezoelectric technology to accurately measure water pressure, providing real-time depth data up to 80 meters. This feature alone sets the Aqualand apart from many other watches of its era, catering specifically to professional divers. The ana-digi display offers both analog and digital information simultaneously, which is incredibly useful underwater. The analog three-hand system provides traditional timekeeping, while the digital LCD offers additional functions such as a dive meter system that automatically starts measuring once you descend beyond 1 meter. Logging dive time and max depth, as well as alerting you to rapid ascents via an audible alarm, greatly enhances dive safety. Aesthetically, the two-tone gold-accented bezel, pushers, and crown give this watch a distinctive vintage look that still feels modern when paired with the cream-colored "lumibrite" dial designed for full luminescence in low-light underwater conditions. The unidirectional 60-click bezel is precise for timing your dives, complementing the robust stainless steel case with a screw-down crown to maintain water resistance rated at 200 meters (666 feet). On a personal note, wearing the Aqualand feels like harnessing decades of diving innovation on your wrist. Whether you are a collector or an active diver, this watch offers a unique blend of nostalgia, durability, and practical diving features that continue to impress even decades after its release. Moreover, replacing the three original 371 silver oxide batteries is straightforward, ensuring the electronic functions keep running smoothly. Overall, the Citizen Promaster Aqualand C023-089405 stands as a testament to Citizen’s pioneering spirit in professional diving watches, perfect for those who appreciate vintage tech with real underwater performance.