11 X 35R UNKNOWN/UNCERTAIN

Still getting verification on this.

Cartridge was produced by the B.STAHL PATRONENHÜLSEN und WAFFENFABRIK of Suhl (aka MESSINGHÜLSENFABRIK) which operated from 1871 to 1901 when it was taken over by GECADO (G.C. Dornheim). The company was formed in 1871 by Reinhard Stahl in the name of his wife Babette (hence “B.Stahl”).