Detail
Type Hof - Grenzmühle is a Hof (Farm, Manor, Courtyard).
Kr Luckau - The Kreis for Grenzmühle is Luckau. A Kreis is a government district (similar to a U.S. county).
See Massen - A See notation means the entry is dependent on another entry. In this case, Grenzmühle is dependent on Massen, which should be consulted for additional information.