Erkennungsmarke, help required

[fcmlechma]

Gentlemen,
someone could help me to identify this unit ST. B. 44 ?
Appreciate any comment,
Thanks in advance,
brg,
Martin

[Pervitin]

Possible Stab/Bau Btl.44
http://www.lexikon-der-wehrmacht.de/...BauBtl44-R.htm

[fcmlechma]

Thank you very much,
Thats already a good indication!
Unfortunately, there is not even a little, additional hint in this heritage of the family.....
brg,
Martin

[OSS]

Possibly Beobachter (Art.).

[fox-terier]

Rather Bau Btl.44

[fcmlechma]

Thank you guys!!!