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Instructions for unlocking and locking the watch crown for models with screw-down crowns.
How to measure the hourly average speed of a vehicle using the tachymeter scale.
How to measure the hourly rate of operation using the tachymeter scale.
Notes on the '0' position of chronograph hands and their movement.
Important notes for setting time and date, including AM/PM and minute hand adjustment.
Steps to reset chronograph hands to the '0' position after battery replacement.
Guidelines for maintaining watch water resistance in various conditions.
Impact of temperature on watch accuracy and battery life.
How strong magnetism affects watch performance and how to avoid it.
Recommendations for cleaning and maintaining the watch case and bracelet.
How shocks and vibrations can affect the watch and precautions.
Precautions against exposing the watch to chemicals like solvents and detergents.
Recommendation for periodic professional checks of the watch's integrity.
Instruction to remove the protective film from the case back before use.
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