Mystery to me

[Tony]

Hello guys, First real post so please excuse me if I get any photo attachments wrong. OK, I've had the pictured cartridge case for some time and it's a real mystery to me. As you can see all the marks to the bottom have been worn / polished away, the fuze pocket had been plugged (I think). It's basically 77mm diameter at the top and 104mm at the base standing 390mm. You'll notice it has tabs to the top which I presume rules it out as a QF ? Any help would be much appreciated

 

[kahu1]

12pr 12cwt?. These had screw-in protruding primers, so the 'plug' may be the cut off remains of the primer.

 

[Tony]

Good shout, I think you may have it. That also explains the cut marks across the primer ! Thank you very much.