Timekeeping instruments. Crowns and sealed tubes. Designs and dimensions1 Scope This International Standard specifies designs and dimensions of crowns and sealed tubes and their tolerances. This International Standard is applicable to crowns and sealed tubes of mechanical, electromechanical, and electronic wristwatches of water resistant designs.

test methods and requirements for marking

This Technical Specification provides guidance on:

BS EN 60862-2 is useful in determining the frequency response characteristics and general characteristics of these filters

BS ISO 4309:2010 touches on care and maintenance

BS EN 50288-6-1 describes detailed specifications on the Name and address of the organisation that has prepared the document

vessels and bunkers

the purpose of which is to reduce the risks presented by inflammable gas and air mixtures

including hospitals and nursing homes

Those involved with marine and transportation vehicles

Simple standard tests on free fall specimens for the assessment of safety requirements

water and other ingredients) or raw material (flour

The noise-equivalent bandwidth