Hi Callaway,
First of all, so sorry for your loss. Your father had great taste and left you a tremendous watch, which will last another lifetime if you take good care of it.
Now, you probably don't know that there's been a discussion raging on this forum on what to do with folks who become a member to have us help identify and valuate a watch, and then vanish again. Some newer members like myself like the opportunity learn with these research projects, but other regulars are a bit annoyed by transient visitors.
As to the watch: I checked out
this tread on watchuseek and was able to identify your watch in ~10 minutes. You can then enter the reference number on Chrono24 and the sales forum here to get an idea of dealer's (Chrono24) and private sale (OF) value.
Best of luck, and please let us know if you have additional specific questions!