Flak erkennungsmarke particular.

[gianni59]

Hello to all.
I present this my erkennungsmarke particular.
It was originally issued by 2 Batterie of Schwere Flak Abteilung 230 (0) markennummer 257 words then obliterated.
On the other side of the EKM it was later engraved Schwere Z.B.V. Batterie 10507, markennummer 15.
I'm worried about such a high military unit number 10507, until I found this line:
5. - 6./s.146 was formed in 12:44 (5. from s.Flak Bttr.zbV-10507)
on this website:
schwere Flak-Abteilung 146.
I would like your opinion.
Giovanni

[BlackCat1982]

schwere Flak-Abteilung 232

Close, see above. It refers to the Schwere batterie of Flak Abt 232 (0). Looks OK to me.