are superb timepieces with characteristics that satisfy and often exceed ISO 6425 specifications. On this point, it’s important to underline that diving watches by brands such as Rolex, Omega, Blancpain, Panerai, Doxa etc. Often high-end brands have their own internal certification departments and so prefer not to mention ISO at all. Many prestigious brands specifically choose not to mention ISO 6425 or use the word “Diver’s” on the dial, such as Omega with their Seamaster, Rolex with classic diving watches such as the Submariner and Deepsea, Panerai, Blancpain etc. While diving watches represent one of the most popular types on the market, there are very few ISO 6425-compliant watches. While standard-compliance testing is normally performed by an external authority, most watch brands run the testing themselves and describe their watches as ISO 6425-compliant. Generally, manufacturers who wish to launch a model that complies with ISO 6425 test all the units for water resistance, and perform type testing for the other characteristics, in other words, testing just a few samples from each production run. Watches that comply with ISO 6425 can be marked “Diver’s xxx m” or “Diver’s watch xxx m”. The standard, first published in 1982 and successively updated, was created to help distinguish watches that can be used for diving from other dive-style watches. There is a more detailed article on ISO 6425 specifications here. ISO 6425 diver’s watches are timepieces that meet the specifications of the ISO 6425 standard, principally water resistance (minimum 100 metres), resistance to external forces, thermal shock and magnetic fields, a dive timing device such as a unidirectional rotating bezel, hands that can easily be read in the dark and are clearly distinguishable one from the other, a way of seeing that the watch is running even in the dark, and so forth.
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