TS ISO 6426-2

TS ISO 6426-2 is a vocabulary standard that defines the principal terms used in horology. This part focuses on bringing technical and commercial definitions into a common language, so that terms used for watches, chronographs, alarm mechanisms and other time-measuring instruments are understood consistently. Vocabulary standards are reference tools that reduce ambiguity in product descriptions, technical documentation, cataloguing and commercial communication.

The scope of horological terminology

Within the scope of this document are the main terms and definitions used for time-measuring instruments and related devices. In general technical context, horology covers the components, functions and terminology of timepieces based on mechanical, quartz or electronic principles. Treating technical and commercial definitions together matters because the same part may be described differently in manufacturing, sales and maintenance contexts.

Why shared definitions matter

In watchmaking, terminology is used to distinguish between many sub-elements, from the case and movement to the dial and display arrangement. A vocabulary standard helps keep naming consistent, which in turn supports clearer specifications, catalogues, training material and trade descriptions. This document provides a reference for understanding core horological concepts, but based on the title and abstract it does not imply any specific test method, numerical limit or mandatory performance requirement.

In practical terms, the standard supports a structured terminology base for horology and helps align technical and commercial wording. That is especially useful where manufacturers, suppliers and technical teams need to communicate with precision.