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=engl/F=Johann@Leopold@Wilhelm@Albert@Ferdinand@Viktor/N=v.Sachsen-Coburg@u.@Gotha
Johann Leopold Wilhelm Albert Ferdinand Viktor v.Sachsen-Coburg u. Gotha
alternatively: /cgi-bin/llmult/LANG=germ/P=23001345
Johann Leopold Wilhelm Albert Ferdinand Viktor v.Sachsen-Coburg u. Gotha