Donor Medallion for German POW's 1915 - Any Information?

[AlecH]

I've been offered this donor medallion. From the shape, I take it to be for a woman. One side has a design, which could well be the forerunner of WW2 Partizan's Kampf Badge, vertical sword striking into a nest of snakes with the script - Help for P.O.W.s German 1915. The reverse has a hawk / eagle perched on a globe, I'm not too knowledgeable with German heraldry does any member know from which German state it may signify. The medal appears to be copper with a silver coating. I see this medallion for the first time if members have any information. I'd be pleased to hear from them.
Regards