A moon phase is the most romantic complication in watchmaking, and the Longines Flagship Heritage Moonphase frames it in one of the brand's most storied designs. The Flagship line dates to 1957, and its name refers to the lead vessel of a fleet, the ship that carries the commander's flag.

That nautical heritage shows up on the back of reference L4.815.4.78.2, where the screw-down caseback carries an 18-karat gold medallion featuring a hand-painted enamel caravel. Up front, the domed opaline ivory dial carries applied hour markers and gilt hands, with a moon phase display and a pointer date at 6 o'clock. Powering it is the automatic caliber L899, with a monocrystalline silicon balance spring for magnetic resistance and up to 72 hours of reserve at 25,200 vph.

At 38.5mm wide and 12.4mm thick, with shortened, chamfered lugs, the case is perfectly scaled for a dress watch. A brown alligator strap completes the warm, vintage palette. It is an ideal choice for formal occasions, anniversaries or anyone who wants an heirloom-style watch with modern technical credentials.

Flagship Heritage Moonphase 38.5mm, L4.815.4.78.2

• Case: stainless steel, 38.5mm by 12.4mm, 19mm lugs
• Dial: domed opaline ivory, applied indexes, gilt hands
• Complications: moon phase and pointer date at 6 o'clock
• Movement: Longines L899 automatic with silicon balance spring
• Power reserve: up to 72 hours
• Caseback: screw-down with 18K gold enamel caravel medallion
• Crystal: sapphire, anti-reflective on both sides
• Water resistance: 3 bar; strap: brown alligator with pin buckle

Classic nautical symbolism and a moon phase for the long voyage ahead.