The primer 88, officially called Zündhütchen 88, is a corrosive primer.
The non-corrosive primer was the Zündhütchen 30. You can identify it by the copper plating.
Later the copper was replaced by a lacquer. This is the Zündhütchen 30 schwarz.
The primer 30/40 was a non-corrosive zinc plated primer.
Specially for the German air force they developed the non-corrosive Zündhütchen 43.
Normally they only accepted cartridges with a Zündhütchen 88.
On a single cartridge they (Zdh. 30/40 and 43) looks the same.
Positive identification is only possible by the box label.
Rgds
