Watch Marketing And Maintenance » Swiss watchmaking

No international standard exists yet for quartz chronometers, but COSC has developed rigorous testing based on ISO 3159. Learn how quartz chronometers are tested, certified, and why they are 10× more accurate than standard quartz watches.

The term "chronometer" is one of the most misused words in watchmaking. You'll see it printed on dials from budget fashion brands to Swiss maisons — but what does it actually mean, and what does it take to earn it officially? The Correct Definition "Chronometer" is a colloquial term. The precise technical designation, as defined by international standard ISO 3159, is: "a precision watch...

Gübelin is Switzerland's most prestigious watch and jewellery family enterprise, now in its sixth generation. As an authorised Patek Philippe retailer and Switzerland's largest jeweller, Gübelin represents the gold standard of independent Swiss luxury retail.