I brush-upped my memory.
The difference is that the objective bell is in different piece or in one piece with the main tube.
The pictured one here is:
Hensoldt Wetzlar DIALYTAN pre-war commercial 3 piece
I understand pre-war and early bmj are 3, late bmj (74500- from my old database) and post war are 4.
Am I right?
Hello Dave
My answer is 3?
After all, I do not know much about 4 power scopes.
Anyone else?