The Nivada Grenchen Chronomaster Aviator Sea Diver reference 86001A-OYST is a modern interpretation of a 1960’s original. In this configuration, the Chronomaster has a Stainless Steel case of 38.30mm, with an aluminum bezel insert calibrated for both 60 minutes as well as 12 hours. This watch is powered by a self-winding movement in the form of caliber SW510 BH b. The dial is Black.
