Thanks Mr. Museum , Mr. Research and Andy! A very nice and interresting bar!
I do not think it is traceable. I think the bar might pre-date the 1890s - hardware might well be late 1870s or 1880s - and that it might well be to an incredibly ancient retired army officer not decorated for either 1866 or 1870/71. There were probably some with a combination pretty close to this.
I'd like to add a later picture of mentioned Major Schmitt (from my father's), with his 1905 Hof- und Staatshandbuch entry. The next HuS I have is 1913 in which is is no more mentioned.
On the picture with BZ3aE, KO3, the extremely rare 40 years cross - and just one clasp on Feldienstauszeichnung's ribbon.