Collegamenti

• 
  Crown Caps Info (CCI)
  http://crowncaps.info
• 
  Bottle Cap Index (BCI)
  http://bottlecaps.de
• 
  Davide's Forum
  http://forum.crowncaps.info
• Forum Tedesco
  http://kronkorkenforum.de
• Dmitry Dalimov (Russia)
  https://procaps.ru
• Gadola Fratelli (Italia)
  http://www.worldcrowncaps.it/indexen.htm
• Jamal Kashkay (Azerbaigian)
  http://www.kashkay.com/
• Jerzy Matyjasik (Polonia)
  http://www.yoreck.ugu.pl/
• Marian Jetzlsperger (Germania)
  https://marians-kronkorken.de/
• Pavel Stanek (Repubblica Ceca)
  http://www.beercaps.cz
• Poulsen Brothers (Danimarca)
  http://www.crowncaps.dk