• Locations
• Netherlands
• Zeeland
• Schouwen-Duiveland
• Northwest

• North of Verklikkerpad
• 501-I (2)
• 501-II
• 501-III
• 501-IV (2)
• K. 450b-I
• K. 450b-II
• K. 450b-III
• K. 450b IV
• K. other-I
• K. other-II
• Vf Flak-I
• Vf Flak-II
• Vf Flak-III
• Vf Flak-IV (2)
• Vf other
• Tobruk-I
• Tobruk-II

• South of Verklikkerpad
• K. 450b-I
• K. 450b-II
• K. 450b-III
• K. 450b-IV
• Tobruk

501

Stove connections and emergency exit.

This is how an emergency exit should look like. Still filled with the original pebbles.

This is strange. The ceiling is thinner at the place where the periscope was installed. Maybe the whole roof is thicker and kept on 2 meters for the optics?