The cache is not at this place, but offset from them based on information found on a historical marker at the posted coordinates
The listed coordinates will take you to a small park named for a former Mayor of Philadelphia and first president of the Fairmount Park Commission. Find some information about him on the marker to help you find the cache.
Get the final North coordinate by adding the difference between the year his park was dedicated and his birth year to the decimal part of the coordinate.
He founded a club, too. For the West coordinate add the number of letters in his name and in the full club name and subtract that total from the decimal part of the coordinate.
The cache is a beach safe which replaces the original small mint tin. When placed it contained a few trade coins. It is not necessary to leave public streets to retrieve it, and please hide it as you find it. Bring your own pen.