Yes, I think they're quite rare to find these days. They are not the normal 9mm Parabellum round, they are the Mauser 9mm 'Export' long cartridge used in the some C.96 'Broomhandle' Mausers. From the label, yours were produced just prior to the war starting and are probably commercially-sold ; wartime boxes have a different style of label and more usually copper-jacketed rounds.
I forgot to say ( because I couldn't remember when I wrote the original post ) that this cartridge was also used in the Steyr-Solothurn ( or MP.34 ) submachinegun.......
Thank you again Martin. Do you have a photo of 9 mm ammo boxes for MP 40 ammo??
I have used thousands in my old c96. Those days they were plentyful.
Come on- Just pick up sharp edged stones and throw at me, i deserve it.
Collect ROA, Cossack, Schuma and other WW2 Volunteer militaria.
"Be Humble and kind, for you may find that it was Odin you entertained"
Are you Norwegian too?