Thought I would change it a bit here is my inert J & W 4/44 C S 3" 10lb mortar round complete with inert fuse (5/45 build) also the bakelite transport plug which itself is pretty rare as they often got broken after the mortar was assembled. I also have a live initiator cartridge for it but it cannot be inserted into the tail for obvious reasons.
I have broken the fuse down so you can see the perforation disc the very thin shiny one and one with the transport plug in the mortar with the fuse removed it is a very clean specimen has a 1/8th " hole drilled in the band opposite side to the name. Cheers
(303 cartridge on Rt for scale as usual.)

Click to enlarge the picture