I will add my thoughts to your query but I cannot answer it.
The Canadian 2" fired mortar primary should have a wad and obviously was re-crimped over the lead ball. There is no ball listed in any of my files and obviously fired with the case holes.
The second item I have no idea but again looks like somebody altered a case to fit a lead ball??
The diameter is correct for a 60mm mortar tail and is too large to fit a 2" mortar.
I show two styles of USA 60mm mortar primary cartridges. They are 0.64" diam (15.8mm) and are 1.75-1.8" long overall (44-45mm).
The paper section is 1.42" long (36mm) on the screw-in example.
I cannot help more. I have not seen examples with balls so make your own opinions. Ron.