In the early 60s advertisements read “The Chronomaster is a Super-Chronograph” and “The Croton Nivada Grenchen CHRONOMASTER is a favorite with sports car drivers, airline pilots, skin divers, yacht race enthusiasts, engineers, navigators, scientists, business executives, and a host of others.” Brand: Croton Model: Chronomaster Aviator Sea Diver Reference: 105-9870 Movement: Valjoux 92 Case: Stainless steel Size: 38mm Year: 1960s Strap: Leather Box/papers: No Location: Los Angeles Price: $2,499 or best offer Pictures: [https://imgur.com/a/Adahrin](https://imgur.com/a/Adahrin) Timestamp: [https://imgur.com/a/0JyHL6l](https://imgur.com/a/0JyHL6l) CONDITION & SERVICING \-The dial is in good condition showing a few marks. \-The case is in very good condition, not showing any notable damage. \-Hands and markers are in good condition, both showing matching lume patina. \-Service history is unknown.