From what I could find it is a model 90520.
Band markings read: 361 B and 783519
The story: My father inherited it from his Uncle Frank and I from my father (1994) after he passed away. I've tried it on a couple times but never wore it around. Its been wrapped up in a tin box of my personal memories for 17 years. I never really looked too closely at it until yesterday and noticed the Tiffany & Co sub-branding on its watch dial and Rolex Geneva on its casing. Needless to say, I'm intrigued.
I am going to take it to a local certified Rolex watch smith for cleaning. Apparently he's a 5th generation Swiss watchmaker, so Im hoping hell have some info as well.
I do not know much more than that.
Any information shared would sincerely be appreciated!