Bhlerscher Antinit Stahl / Bhlerlufe Antinit / Bhler Antinit Stahl must have arrived on the scene in 1912 as Schu und Waffe Band VII(sogar 83 kg/mm a Streckgrenze)/ Schuss & Waffe, Volume 7(1913) has a couple articles describing it.

Cheers,

Raimey
rse