Very rare branch of the Heer (army) denoted by the purple color of the board underlay and collar insignia color.  Worn by a Major of this service branch, who were essentially a branch that deployed "Fog Launchers" in battle, essential for offensive operations.  Condition is outstanding with very little signs of wear.  This tunic had tags at one point, and is a private purchase example.  Quality is exemplary.  Size is approximately a 40S in modern US Size, so it's not overly small or large.