🏷️ Basic Information Identification Make: Casio Model: QW-1656/1657/1678 Year: 1997 Generation: Specific to QW-1656/1657/1678 models 📋 Manual Details Information Manual Type: Service Manual + Parts List Language: English (assumed from description) Format: PDF Download Availability Product Availability: Downloadable Content Scope Included Information: Repair procedures, maintenance schedules, parts identification, assembly/disassembly guides Technical Support Support Level: DIY (Do It Yourself) focus Product Quality Manual Quality: Comprehensive (implied by 'superb Repair Service Manual') 📄 Product Purpose Usage Primary Purpose: Repairing, Servicing, Maintaining, Rebuilding Target Audience Intended User: Owners of Casio QW-1656/1657/1678 watches 📄 Watch Features Functionality Core Functions: Timekeeping, Alarm, Stopwatch (typical for 1997 Casio watches) Display Display Type: Digital (LCD) Power Source Battery Type: Coin cell (specific type not mentioned, but common for the era) Water Resistance Water Resistance Rating: Not specified, but likely basic splash resistance for the era Materials Case Material: Resin/Plastic (typical for Casio watches of this period) Strap Material: Resin/Plastic (typical for Casio watches of this period) Dimensions Case Dimensions: Not specified in product description, but typically around 35-45mm for men's watches of the era Movement Movement Type: Quartz Design Design Style: Sporty/Casual (typical for Casio models) 📄 Model Variants Identification Model Numbers: QW-1656, QW-1657, QW-1678 📄 Product History Release Year Year Of Release: 1997 📄 Technical Skills Required Skill Level: Basic to Intermediate mechanical/electronic skills