Info on this German ID disk

[Vegard T]

I just bought this ID disk at a militaria store for about 45 $, any info would be appreciated.

The markings on the disk is:

881

2/le.Art.Ers.Abt

I am sitting on the bus right now so i can't take any pictures until sunday/monday.

[Stacez]

2 (Batterie)/leichte Artillerie Ersatz Abteilung - 2 company/light artillery reserve battalion
You forgot to add number of this battalion

[Vegard T]

Hmm, ok here are all the numbers again:

881

2/le.Art.Ers.Abt. 3

And on the back it says: 0

[Stacez]

Now, it's clear with the number of this battalion
We're talking about 2 (Batterie)/leichte Artillerie Ersatz Abteilung 3

Artillerie-Ersatz-Abteilungen - Lexikon der Wehrmacht

[Matt L]

And the 'O' on the back would be the soldier's blood group.