It looks fine to me- interesting if one collects Estonian units I suppose. The other unit marking is Estnische-Sicherungs-Abteilung 184, 16. Hundertschaft. Only existed for about 10 months or so before becoming Ost-Bataillon 660 (Estn.)
Ohhhhh- pillage then burn...
Thanks all! I had never seen this exact disk before. I appreciate the help!