WW1 'Periscope Prism company' sniper scope???

[Promo]

Quick pic, from left to right:
1. Aldis 1916, serial 71357
2. Aldis 1915, serial 66803
3. Aldis 1916, serial 67678
4. Aldis 1915, serial 67139
5. Aldis 1916, serial 67946
6. Aldis 1916, serial 68914
7. Aldis 1916, serial 70885

I think the mounts on them are self-explaining (except for the idea of someone to swap the rings positions). Of the three that I didn‘t picture I‘ll provide data/pics later.