Here we see the C-shaped catch, brass gleaming. It is odd to find a Brehmer with such a gleaming round-wire catch; normally Brehmer used more substantial square-wire catches on war badges.
Note the shape of the head; while the badges share traits with Juncker, the reverse outline lacks Juncker’s oval shape and telltale flashing on the head. Another part of the badge that screams Brehmer is the notch in the retaining pin. It makes something of a “V” shape and is found on other Brehmer badges. Compare the pin’s marking to Luftwaffe Flaks and you will see they are the same.
The gun itself has many critical points to look for. First, Brehmer Heeres-Flaks lack a roundel next to the breech. Second, look at the flaw in the metal line connecting the elevation and traverse handles; it is a characteristic of all of these badges. Also, the elevation wheel has no round dots on it, unlike the traverse wheel, a curious difference but a clear one to look for.