The Germans seem to have left blank disks everywhere.
This guys stamps are the same set for many different units he is obviously making these.
Blame the Russians for being the root cause for so many unissued erkennungsmarke. . The train of replacement ranks couldn't keep up with the scores of casualties inflicted by overwhelming numbers in opposition, not least the lack of fresh käse and frau the Heer were accustomed to early in the war.