Found in a village

Yesterday, I went to visit an old Saxon lady who said that she has some old military objects, in a nearby village. One member of her family was an officer in the Austro-Hungarian army, then, after the war, became priest in that village, so he had to "hide" the old object from his army time. Because I like history, I wanted to go and check them out. Initially, from the stories told by a friend, she had some old pieces if uniform. But, when I got there, I was somehow wright, but not entirely. This is what I discovered:
































I have two questions:

- from what kind of artillery piece may come that shell (don't worry, it has been deactivated)? After a quick measure, it is 55 mm diametre

- what sword model is this one? I don't know if the writing is clear enaugh