Newbie needs help please

[luckynewbie79]

Hi all,

My grandfather has just kindly give me his old Rolex as he think I could sell it but I have no idea about watches. I have posted some pics for people to look at.
It appears to have all the right markings of a Rolex, on the strap link is Rolex 750. a code 8385 and is 18k. I have took the strap off to look for a code and there a appears to be one but I cannot see clearly. it looks engrave. The watch itself needs some tlc, some pins are missing from the strap and the seconds dial needs re-attaching.

Can some one please help, if it is genuine how would I go about selling, where and price ect.

Thanks