Audemars Piguet Royal Oak
Example for Clous de Paris dial decor
© Audemars Piguet

Dial pattern

Clous de Paris is a special type of dial guilloche or embossing, resulting in small square knobs. It is also called Paris hobnail or simply hobnail and is found, for example, with the watch model Audemars Piguet Royal Oak.

One of the most famous watches to use Clous de Paris as its signature design element is the Patek Philippe Calatrava.