Please help identify

[25thapril]

A friend has these two what I think are mortars the longer one has a detachable tail section while the shorter one is one piece the tails have what look like notches to take augmenting charges? I think they look like WW1 austrian design but an only guessing. I figger that somone on BONC will be able to help Thanks in advance Regards Daryl

 

[Weasel]

Hi Daryl,
Those are great looking rounds never seen those before but i am sure somone will help you out with an ident. Are there any stamps or markings on them?
Best Weasel.

 

[25thapril]

G'day Weasel we cannot find any markings at all A bit of a mystery as to what they are
Regards Daryl

 

[al'saad]

can U put a detailed pics of the tail section bottom please?