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I was looking for things in Google when I found something very useful for a lot of people (or not!). Well, this ring was invented in 1934. I think this is very interesting because <strong>if you want to drive the system you have to placing a coin</strong>! Well, the person can return the coin only if the if a visit is really desirable or if the person wants to open the door (obviously!). I personaly think it`s very useful because you can also earn some money and still avoid the boring people and advertising! I think this is very useful for who is famous because they can earn money and don`t open the door! <em>Just a question:</em> Why is it never sold? It`s unbelievable!
<strong>Talk To Talk:</strong>
What is your opinion?
Is it useful or just to spend money?