Vintage Citizen Promaster Aqualand AY5000-05L Diver's Watch - Electronic Depth Gauge

Rare 1990s Professional Diving Watch with Pioneering Depth Measurement Technology

This is an authentic vintage Citizen Men's Promaster Aqualand AY5000-05L, a legendary diving timepiece that revolutionized underwater sports with its ground breaking electronic depth gauge technology. This specific model represents the pinnacle of 1990s diving watch innovation.

Complete Model Information:

• Full Model: AY5000-05L
• Movement: Citizen Calibre 3740-E70006
• Case Back Stamping: GN-4-S
• Era: 1990s vintage Aqualand series
• Water Resistance: 200M (20 Bar) Professional Diving Rating

Case & Construction:

• Case Diameter: 42mm (perfect diving watch proportions)
• Case Material: Brushed stainless steel construction
• Crystal: Mineral crystal with 20mm lug width
• Crown: Screw-down crown for water protection
• Case Back: Screw caseback with diving watch seal system
• Bezel: One-way rotating elapsed-time bezel with dive timing markings

Revolutionary Depth Gauge System:

The standout feature that made this watch legendary among divers:

• Electronic Depth Gauge: Depth display to 50 meters (125 feet)
• Maximum Depth Memory: Records and displays maximum depth reached during dive
• Analog Display: Depth readings shown via dedicated analogue indicator on dial

Additional Professional Features:

• Precision Chronograph: 1/20 second accuracy up to 50-minute capacity
• Dual Time Display: 12-24 hour time indication
• Date Function: Date display
• Low Battery Warning: Advanced low charge indicator
• Luminous Elements: Hands and markers for underwater visibility

Honest Condition Assessment:

This vintage diving watch shows authentic signs of use consistent with its professional diving heritage and age. Most notably, there are scratches visible on the watch crystal, which I have tried to show in the close-up face photographs to ensure full transparency. These crystal scratches are typical for a watch of this vintage that has seen real diving use.

Additional wear includes normal case and bezel markings consistent with a 25+ year old professional diving instrument that has been actively used.

Critical Water Resistance Disclaimer:

⚠️ IMPORTANT SAFETY NOTICE: While this watch was originally certified to 200M (20 Bar) professional diving standards, I cannot guarantee current water resistance integrity due to its vintage age.

Gaskets, seals, and O-rings naturally deteriorate over time. This watch has NOT been recently pressure tested. For your safety and the watch's protection, I strongly recommend professional servicing and pressure testing by a qualified watchmaker before any water exposure or diving activities.

Why This Watch Matters:

The Citizen Aqualand series was revolutionary - the first widely available watch to offer electronic depth measurement to recreational divers. Before this technology, depth gauges were separate, bulky instruments. This vintage piece dates from 1990-1999 and represents a pivotal moment in diving watch history.

Perfect for:

• Vintage diving watch collectors
• Citizen Promaster enthusiasts
• Anyone interested in pioneering sports watch technology
• Diving history aficionados

This is a genuine piece of horological and diving history - the watch that brought professional depth measurement to the wrist.