You also uploaded his picture referring to an unknown German photographer as author. That's right. But I found that your picture is no original. It is definitely a copy of an older original as the given photo studio's name below the pic A. Jandorf & Co. Berlin didn't exist during the liftime of Moritz Landé. This company – a Berlin-based warehouse-chain, started in 1892. Germany's most-famous warehouse KaDeWe was part of this chain and is the only remainder of this group.