Nivada Grenchen Chronomaster Aviator Sea Diver 86001A-RUBT

This reference, the 86001A-RUBT, pairs the automatic version of the modern Chronomaster with a sporty and functional strap. The “A” in the reference number signifies that the watch is powered by the self-winding Sellita SW510 BH b caliber. The “RUBT” suffix denotes that it comes equipped with a black tropic-style rubber strap, a design that is historically significant and popular for its comfort, durability, and suitability for diving.The watch embodies the core principles of the Chronomaster line: versatility and robust functionality. It is a faithful re-edition of the all-in-one “tool watch” from the 1960s, featuring a chronograph, a bi-directional bezel with both 60-minute and 12-hour scales, and a tachymeter. This combination of features makes it suitable for pilots, divers, and motorsports enthusiasts alike. The 30-minute chronograph register also includes a regatta countdown timer.This specific configuration, with its automatic movement and tropic-style rubber strap, is arguably the most practical for water-related activities, emphasizing the “Sea Diver” aspect of its name. The self-winding movement ensures continuous operation without the need for manual winding, while the rubber strap is impervious to water. The case is made from 316L stainless steel with a double-domed sapphire crystal, blending vintage design with modern materials and reliability.