Vintage Sterling Silver 3D Mentor Apple Charm, Pendant

Sterling silver 3D apple charm/pendant is marked 925 and features a moveable leaf inscribed MENTOR on the top and initials MM or WW under the leaf.  The apple measures 7/8 inch, including the loop and bail, by 1/2 inch wide and it weighs 7.1 grams, so it is heavy for its size.  It is nicely made and in great condition.