What does “Guilloché” mean?

Guilloché is a decorative technique that engraves a repeating pattern into a dial or case. Traditionally it is done on a hand-operated machine called a rose engine or straight-line engine, which cuts precise, repeating lines into the metal. Common patterns include waves, sunbursts, barleycorn, basket weave and hobnail.

Guilloché dials catch light in a way that printed or stamped patterns usually cannot, and hand-made guilloché is a sign of traditional craftsmanship, often found on dress watches from high-end brands. Many modern dials have patterns that look similar but are stamped or machined rather than engraved. Both can look attractive, but hand guilloché is generally more valued, so dealers should be careful with claims. Damage to the pattern is hard to fix, so check for marks or dirt in the grooves.

Typical usage: “Silver hand-guilloché dial with a barleycorn pattern, crisp and clean.” A seller who is not sure whether the pattern is hand-made should describe it as a guilloché-style pattern instead.