A history of the crown cork
Although the crown cork was a revolutionary invention, it was not until the automation of beer racking in the second half of the XX century, that full scale production began.
Most Polish breweries at first used smooth corks and did not take advantage of lithography. In the Eighties manufacturers began applying graphics and paying greater attention to the geometry of corks. The current standard number of teeth is the "blackjack" - 21. In the past years a new type of crown cork was developed - the Twist-off cork, which does not require the use of bottle openers
Many collectors around the world appreciate the various designs of crown corks.