15 and 20 mm unknown type German AP


#1

Hi,

I’m looking for info about German types AP shell 15 and 20 mm unusual construction, from photos.
“Core” descending to the cone in the back. In 15 mm the back part as in an typical H-pzgr, without tracer.
From experimental area.

15 mm - sorry for bad quality, very old photo:
Clipboard

And part of 20 mm, the same design idea:


Grt.
PM


#2