help needed to ID WW I case

[herkules]

Gentlemen,

please help to confirm this case to be period !

the logo inside the lid seems to be difficult to relate to known makers

although I do see some similarities to Poellath / Schrobenhausn ??

thanks for your help !!

Wolf

[herkules]

cased EK / WW I

more pics

[herkules]

cased EK / WW I

one more pic