Locate the phone number at the telephone box and decipher the letters to solve the Final Cache coordinates
N 51 03.(B)(A+C)(C-A)
W 002 17.(A)(A+B)(C)
checksum of decoded numbers = 21
The Fine Pair series was originally started by wizardsmum.
If anybody would like to place 'A Fine Pair' of their own please do, I would just ask that you let mattd2k know first so he can keep track of the numbers and names to avoid duplication.
He also keeps a public Bookmark List of this series so once your cache is published please contact him via his profile page to have yours added.