Siti sui perfin stranieri (a cura di relaurino)

Gli speciali di Filatelia & Francobolli Perfin

Bulgaria - Bulgarian perfins Canada - Canadian Perfin Officials Canada - Canadian Perfins of the Victorian Era Danimarca - Dansk Perfin Samlerklub Danimarca - Toke Nørby's perfin pages Germania - Arbeitsgemeinschaft Lochungen e. V. im Bund Deutscher Philatelisten Gran Bretagna - The Perfin Society of Great Britain Gran Bretagna - Perfin Hong Kong - Hong Kong Perfins Olanda - Perfin Club Nederland Spagna - Spanish perfins U.S.A. - The perfin place