Questions about my great uncle's 1956 Precision

[gnatfish]

I recently acquired my great uncle's Rolex Precision from 1956 through his estate. I am not wise to the ways of Rolex and don't really know what I have or what it is worth. It runs fine, but has some superficial scratches on the crystal. I have a few questions:

Any help would be appreciated. Thanks.

Moderators note: Your post has been edited to conform to Forum rules. No sales or requests for valuation. Hopefully people will give you some good general advice on your watch.