This cache is a Bonus for completing all stages of the Historic Swiss Avenue - Part 1 Adventure Lab. Each succssuful stop will give you the numbers needed for the final coordinates at N32 48.ABC W96 45.XYZ
The cache is not at the posted coordinates. The Swiss Avenue Historical Marker is though, and it is worth stopping by to read. Also GC8DCTW is nearby.
You are looking for a different looking rock. No room for swag or a pen. BYOP