🏷️ Basic Information Identification Make: Casio Model: QW-1827 Year: 1998 Generation: N/A 📋 Manual Details General Manual Type: Service Manual + Parts List Language: English Format: PDF Download Content Content Description: Detailed repair information, hundreds of images, illustrations, blow-up diagrams Availability Downloadable: Yes ⚙️ Engine Specifications Powertrain Engine Type: Quartz Movement Displacement: N/A Power: N/A 🔧 Transmission Powertrain Type: Mechanical Gears: N/A 📐 Dimensions Physical Case Size Approx: 40mm x 35mm Weight Approx: N/A 🔧 Maintenance Service Service Interval: As needed Battery Type: CR2016 (Example) Battery Life Approx: 3 Years (Example) 📄 Features Functions Timekeeping: Analog and Digital Alarm: Yes Stopwatch: Yes Countdown Timer: Yes Backlight: Yes Water Resistance: Likely 50M or 100M (typical for era)