Early Panzer Unit identification - Help.

[Schlange]

I need any INFO, in order to tray identify these early Panzer II units:



In these Panzer units are served two brothers, Karl Wolf and Jacob Wolf.

Portrait photo one of brothers:
(Panzer commander?)



On the background of photos are also something writes, except names these two panzer-crewman.



May be a panzer unit number?

Danke

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