Slim enough to vanish under a cuff and pretty enough to be the first thing people notice, the La Grande Classique de Longines L4.709.1.21.7 is a 33 mm quartz dress watch in steel with rose-gold PVD accents and a white Roman-numeral dial.

The design dates to 1992 and has become one of Longines' most recognizable silhouettes. Its trick is construction: the caseback doubles as the bracelet attachment, a patented idea that lets the case sit at around 5 mm thick and flow seamlessly into the links. On this version, rose-gold PVD on the bezel and alternating bracelet links warms up the steel, while black hands and Roman numerals keep the white dial crisp.

A Longines L420 Swiss quartz movement shows hours and minutes and asks for nothing more than an occasional battery. That simplicity, combined with a butterfly clasp, makes it effortless to wear as an everyday piece or as a refined addition to evening jewelry.

La Grande Classique Rose Two-Tone (L4.709.1.21.7)

• Case: stainless steel with rose-gold PVD bezel, 33 mm, about 5 mm thick
• Dial: white with Roman numerals and black hands
• Movement: Longines L420 Swiss quartz, hours and minutes
• Crystal: scratch-resistant sapphire
• Caseback: solid
• Water resistance: 30 meters
• Bracelet: two-tone steel and rose-gold PVD, 18 mm, butterfly clasp

Featherlight, wafer-thin and warmly toned, this is a dress watch to keep for decades.