Assuming that Heinrich Ebert obtained a royal warrant, I don't see him listed in the 1899 listing:

http://de.wikipedia.org/wiki/Liste_der_k.u.k._Hoflieferanten_1899

http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=187669#Post187669


Kind Regards,

Raimey
rse