INFORMATION:

Battery Grand Gouin HKB1274 StP C342 is situated on the west coast of Crozon peninsular of Brittany and covering the important port of Brest where a large U-boat pens were constructed.
The guns covered the seaward and southern entrance to the port of Brest.

This is a HEER (Army) battery.

Battery Grand Gouin HKB1274 StP C342