Lancaster ubtil you posted that Steigleder catalog page the only other reference of this cartdrige I found is in the book Cartridges of the World ( cant remember the page ), It is described as 9x63 MILLER & GREISS. Other descriptions i found are 9x63 30degrees imporved, 9x63 Mauser. And at www.ch4d.com they have reloadin dies for all of the above.

Best regards

Ernesto.