u/Plenty_Rise6370

This is my late great-grandfathers watch, which he wore every day.

It is what I believe to be a 1970 Day/Date, but I'm not really knowledgeable on Accutron watches.
I was hoping someone here would have some sort of information on this piece.
Planning to get it serviced soon, curious about the apparent 360hz hum and smooth hand movements.

Thanks.