That is awesome Marek. I have never before seen a photo of the HEAT round for the KwK 37 with the KPS skirt style driving band.
Was there any difference in the 7.5cm Gr. Patr. 38 Kw.K. and the 7.5cm Gr. Patr. Hl/A Kw.K. 40 projectiles?
I have a nice 7.5cm Hl/B projectile with a KPS drive band but maybe they are more common.
PC