Army Identity Disc Bau Kolonne 231.

Steel based and in a very good, slightly worn condition. Stamped with „Bau. Kol. 231“ for Baukolonne 231.

The battalion was raised on August 26, 1939 in military district XIII by the Landwehr commander in Nuremberg. The battalion was subordinate to the 231st Infantry Division. In January 1940 the 2nd Company was the basis for the Army Pioneer Battalion 657. This was later replaced by the 15th Company of Infantry Regiment 342. On July 31, 1940, the battalion with the division was disbanded. The companies formed the basis for the railway construction companies 91-93.