I think that what you called Signalkuppe is really Parrotspitze, isn´t it?
What do you think?
I think it could be the Liskamm nose ..
Yes, one the left it is Naso. But I observed the snowy summit on the left of Balmenhorn and Corno Nero far on the horizon. I think this is Parrotspitze.
Compare this picture you hepled to complete.