Omega Constellation 1961.

Wonderful heirloom. It's a very high quality watch that just needs a bit of TLC. It looks like the kind of wear that only a very well-loved watch receives, especially the gold emblem on the back. Your father probably wore this watch daily for many years. Because of that, the value will never be as great to someone else as it is to you.

I also have my fathers daily-wear watch, an IWC automatic, also from about 1961. It is very worn and the dial was repainted. But I have had the movement serviced and it runs well.