ISO 6426-2:2026

Overview

ISO 6426-2:2026 - Horological Vocabulary - Part 2: Technical and Commercial Definitions is an international standard developed by the International Organization for Standardization (ISO). This standard provides authoritative definitions for the principal technical and commercial terms used in horology, the science and art of time-measuring instruments such as watches, clocks, and related devices. By establishing a common vocabulary, ISO 6426-2:2026 facilitates clear communication across the horological industry, supporting manufacturers, suppliers, retailers, and end-users worldwide.

Key Topics

The standard covers a comprehensive set of terminology relevant to modern and traditional horology, including but not limited to:

• Terms Related to Time: Definitions for "time," "date," and other foundational concepts.
• Time-Measuring Instruments: Covers watches, clocks, timekeepers, stopwatches, chronographs, and smartwatches.
• Essential Devices and Parts: Terms related to power supplies (such as batteries, solar cells, rechargeable batteries), time bases (resonators, quartz, tuning forks), and display types (analogue, digital, alphanumerical).
• Functions and Features: Incorporates functions like alarms, calendars, counters, dual-time displays, timers, world time, display lighting, and physiological measurement in smartwatches.
• Components: Detailed terminology for movement parts (escapement, integrated circuits, jewels, pallets), casing components (dials, crowns, bezels, watch glass), and accessories (bands, straps).
• Accuracy: Defines key concepts such as rate, daily and monthly rate, deviation, drift, state, and chronometric stability relevant to the performance of timekeeping instruments.

Applications

ISO 6426-2:2026 is valuable for a wide range of practical applications in the watchmaking and horological industries:

• Product Development and Manufacturing: Ensures all stakeholders use standardized horological definitions, reducing ambiguity in design documents, technical specifications, and quality assurance.
• Commercial Transactions: Provides clarity in marketing, contracts, and product literature, supporting accurate product descriptions and legally sound agreements.
• Training and Education: Serves as a foundation for educational materials and technical training, helping new industry entrants understand essential terminology.
• Innovation and Smartwatches: Includes updated terminology addressing advances such as smartwatch features and digital displays, making it relevant to modern and connected timekeeping devices.
• Global Communication: Facilitates international cooperation and trade by offering universally recognized technical and commercial definitions for timekeeping instruments and related components.

Related Standards

ISO 6426-2:2026 is part of the broader ISO 6426 series and relates to other key industry standards, including:

• ISO 6426-1: Horological vocabulary - Part 1: Technical and scientific definitions, focusing on precise and scientific terminology.
• ISO 1413: Standard for shock-resistant watches, defining durability under impact.
• ISO 764: Standard for magnetic-resistant watches, specifying resistance to magnetic fields.
• ISO 22810: Standard for water-resistant watches, establishing testing and performance requirements.
• ISO 6425: Standard for diver’s watches, detailing specifications for underwater timekeeping.
• IEC Electropedia and ISO Online Browsing Platform (OBP): Databases for standardized terminology across various industries.

Practical Value

By adopting ISO 6426-2:2026:

• Manufacturers, suppliers, and retailers ensure consistent use of horological terminology.
• Engineers and designers benefit from clear technical definitions during product development.
• Educational institutions and trainers can align curricula with industry-standard language.
• Consumers and end-users gain a better understanding of product features and specifications.

This standard is an essential reference for anyone involved in the design, manufacturing, quality control, marketing, or sale of time-measuring instruments and their components. It enhances efficiency, reduces misunderstandings, and supports the global harmonization of horological vocabulary.