10.15 Jarmann Blue Box

I`ve been told that this could be from Sweden. Has anyone seen one with the label
still on?
And what year were they loaded?
No headstamp,black powder.

Hi Finn,
I would say, that the box look German to me - just like a M1871 Mauser box.
Just a guess.

Blue German military boxes for 10 cartridges existed. But the missing headstamp in my view is a strong indication against German origin. Also note the quite different shape of the base surface.

The domed primers are also very Ungerman. Jack