Unit marked Luft bread bag

[Eagle mtn]

Hi all
Just got this on eBay this last week for a good deal. I just would like a little help interpreting the unit marking on it.
I know the first three mean Flieger Ersatz Abteilung, but I don't know what the Kfb stands for.
Any insight will be most appreciated

[Kohima]

I believe it may be an abbreviation of the location, though I cannot think what (or rather, where) it may be...
I’ll have a look...

Bob

By the way, I like the repair panel!
I’ve always had an interest in repaired items and often pick them up for solely that reason!
I know. Muppet.

[Eagle mtn]

I figured the same Bob. I would greatly appreciate anything you can turn up
Nick

[Eagle mtn]

Since it is marked to an ersatz abteilung, would it be a replacement or training depot?

[Kohima]

Yes, indeed. That’s exactly what it is.