Nivada Grenchen Chronomaster Aviator Sea Diver 8500 / 3730

This reference is considered by collectors to be an early or alternative designation for the model more commonly referenced as 85004 / 3730. The watches are identical in specification and appearance, indicating that 8500 was likely a preliminary reference number used before it was more consistently engraved as 85004. As such, it features the highly desirable Valjoux 23 column-wheel chronograph movement, housed in the classic 38mm straight-lug stainless steel case. The existence of this reference is a point of interest for collectors, highlighting the minor inconsistencies in reference numbering that were common for Swiss brands during this period of transition and high production. All visual and mechanical characteristics, from the baton hands and dual-purpose bezel to the dial layout, are the same as the 85004 / 3730. It represents the same high-end, manual-wind Chronomaster from the golden era of sports watches.