Weird slot on back of my Kirby?

[KirbysNphones]

Never knew that's what the slot was for, but that makes sense!

 

[eurekastar]

Yes, there is a slot in the handle grip on 500 series Kirby vacuums. In fact, I once found several vintage Mercury dimes in the handle of a 500 series model when I disassembled it for restoration. I don't remember which model, but I do remember finding the coins!