Clubs and Organizations –

• The Perfin Society
• Czech Perfin Club
• Dansk Perfin Samlerklub (Danish Perfin Club)
• Arbeitsgemeinschaft Lochungen (German Perfin Club)
• Magyar Perfin Klub (Hungarian Perfin Club)
• The Perfin Club of Netherlands
• Dutch East Indies Perfin Study Group
• Hong Kong Security Marking Study Group
• Perfins Club Facebook Group

Specific Perfin Areas –

• **NEW** Polarine Cover Study
• Perfin Stamps of Australia
• Perfins on the Stamps of Cuba
• Danish Perfins
• Online Danish Perfin Catalog
• Danzig Perfins
• Finnish Perfins
• French Merson Perfins
• Great Britain Official Perfins
• Hong Kong Perfins
• Italian Perfins
• King George V Silver Jubilee – Perfins
• Mexico Perfins
• Spanish-Philippine Perfins
• Toke Norby’s Perfin Pages
• Railroad Perfins of the USA
• US Perfin Covers

Other Favorite Sites –