It may need a service at some stage but that shouldn’t cost much.
You may already be planning to clean the case but if you haven’t already got one, buy a jewellers cloth, remove the strap and give the watch a gentle but thorough rub to accentuate the gold shine.
If you’re keeping the strap, and it looks as though it’s a nice one, get a smear of black shoe polish on a cloth and massage it into the strap before polishing the strap.