East of the former battery Lindemann you find two strongpoints. One is situated on Mont Vasseur (Wn Bonn) where the command post of Bt Prinz Heinrich is situated on 102 meters above sea level. On Mont St-Martin is a small Wn with two 637s and a Tobruk. They don't appear on German maps as a strongpoint.
A fine Tobruk for a tankturret.