Vacuum Coin
The story of vacuuming coins goes back decades. At that time, in order to ease the customer's mind about the authenticity of the coin, the exchange and coin dealers used to present their business card to the customer along with the coin. At that time, this business card had the status of a coin invoice and the customer was at ease.
This procedure continued until the money changers decided to press the coins on their business cards to increase the validity of the coin and make their work more beautiful. This process has progressed to the point where now all bank coins are bought and sold only in a vacuumed form. This means that these vacuumed coins have gained so much credibility among the public that people think that if a coin does not have a vacuum, it is not valid. But this belief is not true and all the open and non-vacuum coins minted by the central bank have the same weight and denomination as the vacuum coins.