Nice Old Worldtimer with cal 690 movement you got there fella, not in bad condition too, I'm a bit of an oris fan, on my 3rd one, a TT1 divers, can't beat them
Hope your planning on keeping it in the family, the Automatic movements pretty good, mine only gains 30 seconds a month
Don't sell it! You will not get enough for it to be worth it. Wouldn't you like to pass along your father's watch to his grandkids? It has to be worth more than $150 in sentimental value alone.
Unless you have a crack habit, then by all means...