That’s a stunning katzbalger sword! Very Germanic looking. No doubt it once belonged to someone of great importance.
The orb is a
Globus cruciger, a Christian symbol of authority since the Middle Ages. The double cross is a patriarchal cross (
https://en.wikipedia.org/wiki/Christian_cross_variants), also called an Archbishop cross. German Erzstift ruled by elect Prince-Archbishops were: Cologne, Mainz, Trier, Bremen, Magdeburg, and Salzburg.
I found a similar trident mark in Zygmunt S. Lenkiewicz,
1000 Marks of European Blademakers (1991), but his identifications seem a bit hit and miss. The bibliography reference is to Gyngel’s
Armourers Marks.
There is a double cross orb symbol ascribed to a Solingen smith in both Kinman and Lenkiewicz above, but the orb looks different.