Cache is not at these coordinates, which will put you inside a convenience store at the foot of Indian Queen Lane, the original main street of East Falls, then called Falls Village, Philadelphia County. (There's no number 37 these days.)
You don't want to enter the store unless you are buying gas, a snack or a soda. It's the parking lot you are interested in.
Like many lots, there are all sorts of signs in all sorts of sizes and colors. Many of them have telephone numbers. You are looking for a specific phone number in the odd format of: X-XXX-XXXX-XXX.
Let's take each of those numbers and assign it a letter so we end up with: A-BCD-EFGH-IJK
It's someplace on the property of the convenience store, and outside, not inside. It's in plain sight, not covered up. ["plain sight" means NOT behind a door, e.g. trash containers, that might be open!] By my count it should appear at least 12 times, if everything is up to code. The Philadelphia Police patrol the area pretty regularly, so try to be discreet.
Now about the cache: You can find it at:
N 40° IJ.C2D′ W JK5° AA.A5C′
It's a camoed pill bottle which contains only a log. There is on-street parking near the cache, but seldom a vacant spot. BYOP.
Congrats to HaveBirdWillGeo for FTF