You cannot open up a new door with an old key.

You would be able to see, oh, your old key was in the list, and it's been replaced by the new key.

Just you look inside it, the old key is tied to the spring lock.

I was disappointed yesterday and found some of the old keys today.

Well, the old key had not been taken from him yet.

Last night I couldn't get the old key to work in the lock.

When trying to unlock a piece of furniture, he first tries an old key.

Like a spy she'd felt as she came up the front steps with the old key in her hand.

"Then get the old keys and don't waste my time!"

I had never imagined myself doing research that required an old key.