🏷️ Basic Information Identification Make: Casio Model: QW-1978 Year: 1998 Generation: N/A 📋 Manual Details Document Manual Type: Workshop Service / Repair Manual Language: English Page Count: Unknown (PDF download) Format: PDF Compatibility Operating System Compatibility: Windows, Mac ⚙️ Engine Specifications Quartz Movement Engine Type: Quartz Movement Displacement: N/A (Electronic Module) Power Source: Battery 🔧 Transmission Operation Type: Electronic Timekeeping Module Gears: N/A (Digital Functions) 📐 Dimensions Case Case Diameter: Approx. 33mm (typical for era) Case Thickness: Approx. 8mm (typical for era) Lug Width: Approx. 18mm (typical for era) Strap Strap Material: Resin (Likely) 🔧 Maintenance Battery Battery Type: CR2016 (Common for similar models) Battery Life Estimate: Approx. 3 years Cleaning Water Resistance: Likely 50M or 100M (Standard for sports models) 📄 Features Timekeeping Display Type: Digital LCD Time Formats: 12/24 hour Functions Alarm: Yes (Likely daily alarm) Stopwatch: Yes (Likely 1/100 second stopwatch) Timer: Yes (Likely countdown timer) Lighting Illumination: Yes (Likely electroluminescent backlight) 📄 Parts List Components List Availability: Included in PDF Key Components Covered: Movement parts, case components, strap, crystal