Daring post with all the no-date-PuristS among us: back in 1966 Heuer introducd the first Carrera model with date: the Carrera 3147 "Dato 45". The "45" comes from the fact that the minute counter adds up to 45 minutes. The first generation "Dato" (like this one) were only produced in 1966 and 1967.
It’s my son’s college move in week again. Summer weather needs an old reliable that can also weather three time zones in a jiffy. Glad that this timepiece is working real hard during this hectic period. Cheers!