1912-2006. Double, mint never hinged / unused and used collected in 3 Lighthouse-albums. Isolates unused, mostly however mint never hinged and additional used collected and in the main numbers obviously complete. Some also specialized to perforations collected like number 94-107 (with mint never hinged number 99 C photo copy of a certificate Rupp for block of four) or service number 1-8 (with number 2 C used photo expertize Hunziker "faultless") souvenir sheet 1 mint never hinged as well used with special cancel included and so on