ISO 10553-2018 PDF

Full title and description

ISO 10553:2018 — Horology — Procedure for evaluating the accuracy of quartz watches. This International Standard defines procedures for measuring and reporting the running accuracy of quartz watches, for individual instruments and for lots, and describes how measured accuracy relates to the accuracy classification indicated by the manufacturer.

Abstract

This document specifies the procedure for evaluating the accuracy of quartz watches, individually and by lots (Annex A provides methods for statistical evaluation by lot). It also defines the relationship between the accuracy observed in testing and the accuracy classification declared by the manufacturer. The standard applies to quartz watches that have accompanying documentation stating an accuracy classification.

General information

• Status: Published (confirmed during systematic review).
• Publication date: 15 November 2018 (Edition 2, 2018-11).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 39.040.10 (Horology).
• Edition / version: Edition 2 (2018).
• Number of pages: 15.

Core bibliographic and lifecycle details (status, edition, pages, committee and review history) are recorded in the ISO catalogue entry for ISO 10553:2018.

Scope

ISO 10553:2018 applies to quartz watches for which an accuracy classification is provided in the accompanying documentation. It defines how to measure running accuracy for single watches and for lots, and specifies statistical methods (see Annex A) to evaluate lot conformity and to relate measured values to declared accuracy classes. The procedures are intended to provide consistent, reproducible results for manufacturers, test laboratories and conformity assessment bodies.

Key topics and requirements

• Defined test procedures for measuring the running accuracy of quartz watches (individual testing).
• Methods for sampling and statistical evaluation of accuracy by lot (Annex A).
• Criteria for relating measured accuracy to manufacturer-declared accuracy classifications.
• Requirements for test conditions, measurement reporting and documentation to ensure reproducibility and traceability.
• Guidance for interpreting results in production, quality control and certification contexts.

The above items summarize the principal technical topics and obligations that the standard sets out for testing and reporting accuracy in quartz watches.

Typical use and users

Primary users include watch manufacturers (quality and R&D teams), independent testing and calibration laboratories, conformity assessment and certification bodies, retailers and after-sales service centers that verify watch performance, and regulatory or standards bodies involved in horology. The standard is used for production quality control, pre-shipment testing, type/lot verification and for establishing consistent accuracy claims in technical documentation.

Related standards

ISO 10553:2018 sits within the suite of horology standards developed under ISO/TC 114. Related and commonly referenced horology standards include ISO 3159 (chronometer testing and requirements), ISO 764 (magnetic resistance), ISO 22810 (water-resistant watches), ISO 1413 (shock-resistant watches) and other ISO/TC 114 deliverables addressing dimensions, symbols and test methods for watches. These standards are frequently consulted together when specifying performance, marking and testing requirements for timekeeping instruments.

Keywords

horology; quartz watch; running accuracy; accuracy classification; lot testing; statistical evaluation; watch testing; ISO 10553:2018.

FAQ

Q: What is this standard?

A: ISO 10553:2018 is an International Standard that specifies the procedures for evaluating the running accuracy of quartz watches, both for single instruments and for lots, and for relating measured accuracy to manufacturer-declared accuracy classes.

Q: What does it cover?

A: It covers measurement procedures, sampling and statistical evaluation methods (Annex A), reporting and the relationship between test results and the accuracy classification that accompanies the watch. It applies specifically to quartz watches that carry an accuracy classification in their documentation.

Q: Who typically uses it?

A: Watch manufacturers, test laboratories, certification/conformity bodies, quality assurance teams, and service/repair centers use this standard for production testing, certification checks and to validate accuracy claims.

Q: Is it current or superseded?

A: ISO 10553:2018 (Edition 2) is the current version; it replaced ISO 10553:2003 and was reviewed and confirmed in 2024, so the 2018 edition remains the active standard.

Q: Is it part of a series?

A: It is part of the body of horology standards maintained under ISO/TC 114 and is commonly used alongside related horology standards such as ISO 3159, ISO 764, ISO 22810 and ISO 1413 for broader watch performance and testing requirements.

Q: What are the key keywords?

A: horology; quartz watch; accuracy evaluation; statistical lot testing; accuracy classification; watch testing; ISO 10553:2018.