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2L series (2L75)
4L series (4L75)
4S series (4S71・4S76・4S77・4S79)
6L series (6L75)
6S series (6S37・6S74・6S77・6S78・6S96・6S99)
68 series (6870・6890・6898・6899)
8L series (8L36・8L75)
BGJCCO1-2301

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Table of Contents
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Summarization of Contents

HANDLING CAUTIONS
Safety Precautions for Children
Instructions to keep watches and accessories away from children to prevent accidental swallowing.
Environmental Precautions
Advice on avoiding places with volatile agents, extreme temperatures, or high humidity.
Allergic Reactions and Skin Irritation
Guidance on stopping use and consulting a specialist for skin reactions.
General Handling Cautions
Additional warnings regarding disassembly, disposal, and accidental damage.
CAUTIONS ON WATER RESISTANCE
Water Resistance Warnings
Specific warnings against scuba diving and the importance of crown usage when wet.
Water Resistance Precautions
Advice on avoiding prolonged moisture, sweat, dirt, and using the watch in baths/saunas.
NAMES OF THE PARTS
6898 Movement Parts
Identifies parts of the 6898 manual winding movement with diagrams.
6870, 6890, 6899 Movement Parts
Identifies parts of the 6870, 6890, 6899 manual winding movements.
4S71 Movement Parts
Identifies parts of the 4S71 automatic winding movement.
HOW TO USE
Crown Operation
Explains the types of crowns and how to use them for winding and setting.
How to Wind the Mainspring
Detailed procedure for winding the mainspring for manual and automatic watches.
Automatic Winding Function
Explains how the mainspring is wound by natural arm movement.
Power Reserve Indicator
How to read and use the power reserve indicator.
How to use the chronograph (6S series)
Before using the stopwatch function
Pre-use checks for mainspring winding and stopwatch hand positioning.
Names of the chronograph parts and their function
Identification of chronograph components and their purpose.
How to use the tachymeter
How to measure average speed of your vehicle
Steps to measure vehicle speed using the tachymeter scale.
How to compute productivity rate per hour
Steps to measure production rate using the tachymeter scale.
TO PRESERVE THE QUALITY OF YOUR WATCH
After-sale service
Information on guarantee, repair, and replacement parts.
Inspection and adjustment by disassembly and cleaning (overhaul)
Recommendation for periodic servicing to maintain watch performance.
Daily care
Crown Maintenance
Importance of periodically turning the crown for maintenance.
Watch body and band care
Metallic and Leather Band Care
Cleaning and maintenance advice for metallic and leather watch bands.
Skin Sensitivity and Band Fit
Notes on skin irritation and proper band sizing.
Gold Watch Care
Information on 18-karat gold properties and care.
How to use an adjustable three-fold clasp
Adjusting Band Length
Steps to adjust the length of the watch band using the clasp.
Wearing and Taking Off the Watch
Instructions for wearing and removing the watch with the clasp.
Magnetic resistance (Magnetic influence)
Avoiding Magnetic Products
Guidance on keeping the watch away from magnetic items to maintain accuracy.
Lumibrite
Lumibrite Illumination Data
Reference data on illumination levels based on light conditions.
Troubleshooting
Watch Stops Operating
Solutions for when the watch stops working, including winding and retailer consultation.
Watch Loses/Gains Time
Causes and solutions for timekeeping inaccuracies, including magnetism.
Date Changes Incorrectly
Solutions for incorrect date changes, often related to AM/PM setting.
SPECIFICATIONS (Movement)
Movement Specifications Table
Detailed specifications including caliber, vibrations, loss/gain, driving system, duration, and jewels.

Table of Contents