Strange Prussian Trio

[nachtwuenscher]

I was lucky to get my hands on this trio. Looks similar to the Prussian c/82 Granate but with three driving bands - that are soldered (like the Austrian ones of the M75 series - with 4 driving bands). They seem to be constructed before 1880 since they have a hole for a safety pin. This hole is quite off-center like in the c/61 series... The strangest thing is the diameter of the largest one: 9.7cm at the bottom (height 24cm). The other two are standard 7.7cm with a height of 19.7 and 19.4cm.
Maybe one of you fellows has seen something similar before? Any comment is welcome!

 

[sgdbdr]

https://gallica.bnf.fr/ark:/12148/bpt6k6245109d/f66.image

 

[nachtwuenscher]

In principal this is a good idea but the diameter of the small ones is 7.7 or 7.8cm (not 7.4cm as for the 8cm M94) and furthermore the M75 fuze is way too large - it does not fit into the fuze hole. One last point is the hole for the safety pin - a M75 does not have any.