11mm Mauser

I recently picked up this 11mm Mauser cartridge. Anything important or just a common item? There’s no headstamp on the A-base. Any help with the age of the cartridge or who made it?

I have seen references to unmarked 11 m/m Mauser cartridges loaded with the M71 round nosed bullet having a connection to the German assistance to the Irish rebels during WW.I. Whether or not this is correct I don’t know. Even the possibility this claim is true is pretty interesting tho. Jack

Very interesting. I’m from South Africa and I picked up the cartridge here. I wondered if it was perhaps made for Askaris in German East Africa.