Chronomaster Only: The Super-Chronograph by Nivada & Croton

Chronomaster Aviator Sea Diver: this singular name belongs to one of the most original professional watches of the 1960s, combining an unparalleled number of functions with a timeless design. Created in 1961, this chronograph was produced for around ten years under several brand names, through a partnership between the Swiss company NIVADA SA and the American firm CROTON WATCH CO. This led to some of its dials bearing probably the most complicated name in watchmaking history: CROTON NIVADA GRENCHEN Chronomaster Aviator Sea Diver. Thanks to the authors' trademark rigorous methodology, the signature of the 'ONLY' reference works, this book reveals the incredible diversity of the Chronomaster models. It is intended both as an initiation for connoisseurs of exceptional watches and as a reference guide for collectors. This legendary watch will doubtless thus regain the place it deserves among the most desirable 1960s chronographs.

Anthony Marquié is a French national and a trained aeronautical engineer. He swiftly turned to an international career in finance and investments. He has always been a collector of both modern and vintage watches, including many icons from the Omega production. Today he spends a lot of his time looking for rare examples, as well as studying the market for prestigious watches and collector's pieces. Grégoire Rossier is a Swiss biologist specializing in bioinformatics. He became a watch enthusiast at the age of 13 when he inherited his first Omega Seamaster, but it was only much later that he started serious research on the Moonwatch. Applying his experience as a researcher, he developed a systematic database of thousands of entries referencing all his observations as well as the market trends for several versions of the Speedmaster.