Rotring belongs to the Sanford group; the contact in Germany is Sanford GmbH, Schnackenburgallee 43, 22525 Hamburg, tel. +49 800 8 500 500, where the service centre for Parker, Waterman, Papermate and Rotring is based. Collectors report that on direct enquiry even individual nibs (especially for inexpensive models) were sent against invoice by post; otherwise sending in the pen is usual.