Croton Chronomaster Aviator Sea Diver (which is in the running for best watch name, ever).
This is a 2nd generation model with a Valjoux 92 (105/9855) and made between 1962 - 1966, the Tritium dial tells us it wasn't made right at the start of production. Brilliant broad arrow hands, about 98 functions packed into a singe chrono and a the minute counter is a jump counter to help regatta timing. Came to me recently from a PEI estate/downsizing auction claiming a recent service. All original except for the sub-dial seconds hand which is an incorrect replacement. If you have a copy of the "Chonomaster Only" book, let me know.