German 20mm (2cm) Panzergranate 40
Here’s something ordinance collectors know you don’t find every day, a Pzgr 40 tungsten core armour piercing composite rigid round/shell. These projectiles were used in the 2 cm KwK 30 and 2 cm KwK 38:
https://en.wikipedia.org/wiki/2_cm_KwK_30
From wiki
This turret was found on vehicles like the Panzer II and SdKfz 223, and was capable of piercing 40mm of armor at 100 meters. They were typically loaded in magazines of 10 rounds.
The next two photos are of the tracer cartridge (emptied out on mine):
