This German grenade was designed to prenetate concrete. Röhling Betongranate, 35 cm, 900 kg and it could breach at least 3.5 m concrete.
Belgian 120 mm grenade.
The breech of a 120 mm gun.
Searchlights were also placed in the concrete.
A box filled with fuses.
One of the 7.5 cm Pak canons.
A double Maxim Mg. The one on top is active. The lower one is a spare.
The nozzle of this Mg.
The radiator for forced water cooling.