This cache is the bonus final for the Wild Geese: Flock Together Again Adventure Lab series. To obtain the coordinates, you must complete the series. A link to the Adventure Lab series is avaliable here.
BYOP!
The cache is located at N 40° 37.ABC W 77° 33.DEF
Congratulations to DT4E for being FTF (along with her sidekick PMan14)