Aiming instructions

3.200 is the main direction in mills. "mr" is for "mehr", so more. "wg" stands for "weniger", so less. The actual field of fire for this gun is from 3.620 untill 2.550 mills.

Here the main direction is 3.700 mills, fitts with pictures below.

The numbers (s.a. 3.200) give the directions in mills. The names (s.a. Theodor and Eisen) are codes for pre-sited targets, in this case (parts of) beaches at Roscoff.