Note that the index numbers are only technical numbers which have no persistence. After a new system generation is done, all of them are invalid. To generate a persistent link, use the name.Use the URL:
http://ww-person.com/cgi-bin/l3/LANG=germ/F=Carl@Franz@Caspar/N=v.Breidbach-Bürresheim@gen.@v.Riedt
Carl Franz Caspar v.Breidbach-Bürresheim gen. v.Riedt
alternatively: /cgi-bin/llmult/LANG=germ/P=71030576