International standards

ISO 3159: Horology - Chronometer Watches:

Description: A standard that establishes requirements for chronometers, including tests for accuracy and resistance to external influences.

Key points:

• Requirements for running accuracy
• Resistance to temperature changes
• Impact resistance tests

ISO 764: Horology - Magnetic Resistant Watches:

Description: Standard defining requirements for watches resistant to magnetic fields.

Key points:

• Acceptable levels of magnetic susceptibility
• Magnetic Field Resistance Testing Methods

ISO 22810: Horology - Water-resistant Watches:

Description: Standard establishing requirements for water-resistant watches and methods for testing them.

Key points:

• Waterproofing categories
• Leak tests