11-ishx36R ID

Although I have this round with my Gasser-Montenegrins, the date might not fit. It is lead ball with a flat tip, brass case, and copper primer. The headstamp (clock-wise) is: VIII / 78 / C / 18 / .
I can’t seem to nail down the correct user of the single ‘C’ at 6:00. Can someone please tell me who made it?

Jon, it is a 11 mm Gasser M. 1870 cartridge made by Cornides & Cie., Sankt Veit an der Triesting, Austria. Regards, Fede.

Thanks for the country ID!