Thin watches have a way of disappearing under a sleeve until the moment you want them seen. The La Grande Classique de Longines L4.709.4.51.2 is built on that idea, pairing a slim 33 mm steel case with a black sunburst dial and Roman numerals for a look of pure, quiet elegance.

La Grande Classique arrived in 1992 and quickly became one of Longines' signature designs. Part of its secret is construction: the caseback doubles as the strap attachment, a patented Longines approach that keeps the profile flat and the lines uninterrupted. The black dial adds a dose of drama to that minimal silhouette, with slender stick hands sweeping over a sunray finish that catches the light.

The Longines L420 Swiss quartz movement shows hours and minutes only, which suits the design's less-is-more attitude and keeps maintenance simple. On a black leather strap it reads formal enough for evening wear and understated enough for the office, on almost any wrist.

La Grande Classique 33 mm Black, L4.709.4.51.2

• Case: stainless steel, 33 mm, slim profile
• Dial: black sunburst with Roman numerals
• Movement: Longines L420 Swiss quartz (hours and minutes)
• Crystal: sapphire
• Caseback: closed
• Water resistance: 30 meters
• Strap: black leather, 18 mm, with pin buckle

A study in restraint that has been winning admirers for more than three decades.