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=Karl!@Friedrich@Alois@Leonhard@Gustav/N=v.Bianchi@di@Casalanza
Karl! Friedrich Alois Leonhard Gustav v.Bianchi di Casalanza
alternatively: /cgi-bin/llmult/LANG=germ/P=12086027
Karl! Friedrich Alois Leonhard Gustav v.Bianchi di Casalanza