Key manufacturer is "Vapor" and if you google them, they make transit equipment (bus doors, subway doors, maybe other things?---no keys shown on their website).
I mean, I guess the obvious thing is: "it's a bus door key, stupid", but I'm looking for verification of that.... Or not. PM's cool.
Pixelated portion above is the 12-16 digit number; not clear if it's a part number or serial number (each cast key w/ a new serial number cast?).
Customer name pixelated above. Manufacturer name (Vapor) in the clear.