WW1 relic identification
Hi! Last year I went metal detecting in an old giant traininggrounds of german Sturmtruppen from ww1. I found a lot of shrapnel, but also this piece. It seems to be some kind of plug from a fluid container, but after doing research, I cant find anything similar on german fuel cans or drinking tins. It still has a piece of felt or some waterisolation in it. There is a chance it could have been post war, but the place where I found it was very abandoned and they layer of dirt I found it in was very old, comparable to the dirt I found the shrapnel in. Can anyone help? It seems to be aluminium (or possibly Zinc, but there is no zinc corrosion visible so I doubt it.)I found it in the Koppenberg Forest, in Oudenaarde (Near the river Scheldt, the old trenches are still visible there)
thanks!