2cm Br Spgr VK l'spur

[MINENAZ16]

I found two different diagrams for the 2cm Br Spgr VK l'spur.
I only saw a shell with short tracer cavity (same as the 1st diagram).
Is it a mistake (second diagram) ?

 

[Alpini]

Yes, it's a mistake. Here's an original drawing for manufacturing:

 

[URG86-collector]

Do I get it right, that these are projectiles for the 20x138B Flak ? Could you explain what the abbreviation " v.k. " stands for ? It seems to suggest that a "verkürzte Leuchtspur" (shortened tracer) is meant, but then the spelling does not fit. I did not find it in the "H.Dv.4812_Merkblatt_Munition_2cmWaffen", that I do have as a .pdf-document.

Thanks in advance and best regards from Germany,
urg86-collector