🏷️ Basic Information Identification Make: Casio Model: QW-2090/2190/2191 Year: 1999 Generation: N/A 📋 Manual Details Publication Manual Type: Repair Manual + Parts List Language: English Page Count: Unknown Format: PDF Download ⚙️ Engine Specifications Power Train Engine Type: Quartz Movement (Electronic) Displacement: N/A Power: N/A 🔧 Transmission Drive Train Type: Analog/Digital Combination Gears: N/A 📐 Dimensions Physical Length: Varies by model (typical case size: 40-50mm) Width: Varies by model (typical case size: 35-45mm) Height: Varies by model (typical case size: 10-15mm) Weight: Varies by model (typically under 100g) 🔧 Maintenance Routine Service Service Interval: Battery Replacement (typically 2-3 years) Oil Capacity: N/A 📄 Features Watch Functions Display Type: Analog and Digital LCD Water Resistance: Varies by model (e.g., 50M, 100M) Alarm: Yes (usually multiple alarms) Stopwatch: Yes Countdown Timer: Yes Illumination: Yes (e.g., electroluminescent backlight) Battery Type: Coin cell battery (specific type varies) 📄 Technical Specs Movement Movement Calibre: Specific to QW-2090/2190/2191 (detailed in manual) Accuracy: ±15 seconds per month