TonyE is probably the expert on these, but I think I have (from Top left to bottom right):-

1) Mk III
2) Mk IV
3) Mk VI
4) 1942 dated Canadianicon drill rounds
5) 1950s Mk 10
6) 1980s Italianicon drill rounds for UKicon cadets

Great thread! For me, collecting the accessories and books is more than half the fun.