Reibert had been publishing this series
of "instruction" books since 1929, but had made similar ones since many
years before.
They only paused between 1946 (after the capitulation of the Wehrmacht) and 1958 (shortly after the
Bundeswehr was founded).
Besides the info specific to their
task, each version starts with German history & culture and
general information for soldiers.
The two examples in my collection are identical upto page 173 after
which the information becomes more specific to their branch.
Once owned by a Fünker in the 3rd companie of the
Nachrichten-Ersatz-Abteilung 5 (founded in Stuttgart upon German
mobilisation; 26/09/1939).
Also complete but thinner (319 pages vs. 385) and in better condition,
this one however was never registred by any soldier.