Rolex 18039 from the 1980s

[Watchnoobgurl]

I would very much appreciate your help as I've spent hours online trying to do some research about the value of this watch.

I've come into possession of my fathers watch who my mother purchased for him in the early 80s

Any information I've come across are for gold watches - I do not know if it is gold or just stainless steel - the band itself is stainless steel

Any help or estimates in value would really help as I'm going to school and will need the money

Much appreciated