u-Boat Classico 45 Tungsteno, green case, model 9581/a—made in Italy. Ilvo Fontana, a skilled craftsman specializing in precision instruments, received a prestigious commission from the Italian Navy. He was tasked with designing a new watch for its pilots. This challenge had to meet the Navy’s high-quality standards and very precise technical specifications, but above all, it had to guarantee maximum visibility and reliability under any lighting or weather conditions. However, unfortunate circumstances at the time prevented this from happening. In 2000, Italo Fontana, Ilvo’s grandson, came across the precious designs, which became his inspiration for the first u-Boat watch. Condition: New Year: 2026 Original Papers: Yes Original Box: Yes Manufacturer’s Number: 9581/a Type: Men’s watch Case Material: Stainless steel Dial: Green Diameter: 45.00 mm Strap: Leather Clasp: Pin buckle Clasp Material: Stainless steel Movement: Automatic Caliber: Sellita SW 500 Power reserve: 62 h Vibration rate: 28,800 vph Glass: Sapphire crystal Water resistance: 100 m Functions: Date, small seconds, chronograph Additional features: Left-side crown, luminous hour markers, luminous hands