They must have been... At least one century? Seems like they have been around forever.

[ Good question, he couldn't remember when the things were invented.
Thinking that over was set aside for a brief flash of excitement as she nailed it! The name sounded almost perfect now! ]

That! Now all you have to do is say it more quickly.

[ Sleeping who knows where. Aziraphale. If only he had known... They might have shared a train bench. Professionally. ]

It doesn't matter.