first is writing EC 42!
First one could be a .45 ACP Evansville-Chrysler Plant 1942,
Second could be Mauser catrigdes from the Waffenwerke Brünn A.G., Werk Povazska Bystrica plant, or Kupferwerk Ilsenburg A.G., Ilsenburg, Harz as they both have the Z as code,
Third one could be a British wwI catridge, from the Royal National Factories,
Fourth one looks German, but you are not giving much details about the cases, so thats all I can say for now.
The third one is Austrian,it is BMF in a monogram,I can supply a picture if needed,Berndorffer Metallwarenfabrik.
JEDEM DAS SEINE