Help needed from Rolex Chronograph experts

[John in MA]

Guys,

I work with a gentleman who's father left him his rolex watches when he passed away. Well taken care of and always serviced by Rolex.

The first is a Rolex Sub 5513 from 1969. Great condition but sadly it no longer has the matte dial or hands. This is his daily wear watch.

The 2nd one is the one that we are curious about. It was a chrono that his mother purchased for his father when he was born in 1965. This is the one that he cherishes and only wears it about twice a month. Any help on identifying it and an idea of value would be very helpful to him as he wants to have some idea of worth before getting it appraised.

Thanks for the help guys!

BTW, I think he has the original documentation for both but don't remember.