It looks like some kind of seal or button to me.
Thanks, KradSpam, maybe it is some kind of seal. Material is lead.
tsarist eagle - probably a seal on a old document
Looking for following WWII German items:
- anything dealing with Allenstein (Olsztyn) and Wehrkreis I in East Prussia,
- entrenching tool carrier (straight and folding),
- forestry and hunting items,
Join my Facebook group - https://www.facebook.com/groups/890720157646923/
The inscription reads ДОБРЖИН * ГАМ, that doesn't make a lot of sense to me. I think that this is a post bag seal - пломба in Russian.
Thank you all for info, and specialy big thanks to Evgeni M and KradSpam.