Case Shape: Round Material: Stainless steel Glass: Scratch-resistant sapphire crystal, with multi-layer anti-reflective coating on both sides Size: Φ 40.00 mm Water resistance: Water-resistant to 10 bar Dial Color: Silver Index: Applied Arabic numerals Hands: Black hands Movement & Functions Movement type: Automatic Caliber: L888.4 Caliber: Self-winding mechanical movement, 25,200 vibrations per hour, power reserve of 64 hours, monocrystalline silicon balance spring Functions: Hours, minutes, seconds, date display Special features: COSC certified chronometer Strap Material: Stainless steel Buckle: Triple safety folding clasp with push-button opening mechanism The Longines Spirit was born from the design of Longines watches and instruments, trusted and loved by the great pioneers who explored the sky, land, and sea, and whose stories are still told today. Amelia Earhart, Paul-Emile Victor, Elinor Smith, and Howard Hughes, among other legendary aviators and explorers, chose Longines as their partner in their harsh adventures. And now, Longines announces a new timepiece that embodies their pioneering spirit. This collection is also a tribute model that pays homage to those who have made their mark on history with their records, achievements, and courage, and who continue to inspire the next generation. The Longines Spirit is a chronometer certified, a testament to high precision, for all models.