The so-called 5-mark oak is located in the Guttau enclosure in the Kellenhusener forest and is freely accessible.
It is a pedunculate oak of about 26 meters in height with a trunk circumference of about 6 m, whose age is estimated at 350 years. The oak has received its name because it served Maximilian Dasio as a model for the design of the back on the stamped from 1927 to 1933 5-Reichsmark coin with the motif of an "oak tree".
Source: Wikipedia
Baum has died since 2012.
In nature, the oak is much more impressive than in the photos 👍🏻