Detail
Type Vw. - Altdorf is a Vorwerk (Residence or Farm).
Kr Sagan - The Kreis for Altdorf is Sagan. A Kreis is a government district (similar to a U.S. county).
See Bergisdorf - A See notation means the entry is dependent on another entry. In this case, Altdorf is dependent on Bergisdorf, which should be consulted for additional information.