This is WN Drossel 1 (Wn 219/1). It can be found in a forest along the Route de Slack, which goes from the village Slack south. A railway battery was planned, but it was never operational. Nearby lies a second Stp, it was not visited.
Due to the shrapnel walls and the tobruk it looks big.
A long extension with a tobruk.
Inside it is almost fully sanded.