By seeking information on the net, I came across this drawing in a Russian(??) forum (Cyrillic writing, sorry I did not record the name and the link due to an handling error).
It’s 8mm Lebel and, depending on the number and the German language used, I guess this a drawing came from a DWM document.
Looking through the list of numbers of the DWM for confirmation, I saw two entries for the 8x50R Lebel: No. 472 and No. 472A.
Has anyone already meets these 8mm Lebel cartridges or other DWM 8x50r Lebel made? And what the difference between 472 and 472A, unlike bullets I guess?