Detail
Type Rg. - Letsel is a Rittergut (Landed Estate).
Kr Achim - The Kreis for Letsel is Achim. A Kreis is a government district (similar to a U.S. county).
See Kluvenhagen - A See notation means the entry is dependent on another entry. In this case, Letsel is dependent on Kluvenhagen, which should be consulted for additional information.