Detail
Type Zk. - Birkenweiler is a Zinken (Outlying Farm).
A Überlingen - The Amtsbezirk for Birkenweiler is Überlingen. The Amtsbezirk is the District Office.
See Frickingen - A See notation means the entry is dependent on another entry. In this case, Birkenweiler is dependent on Frickingen, which should be consulted for additional information.