More guess than proof, since I'am out of country, but it looks to me , that this might be the internal configuration of the FP 8001 fuze (impact fuze for the Panzerfaust 30, 60, 100)
The functioning is similar to the rifle grenade fuze , but the gas escape hole beside the striker is not accomodate in the rifle grenade base fuze, but in the Panzerfaust fuze. The outer housing of the fuze is missing, this are the internal parts. Sorry I can't provide more details right now.
Mrfuze, USA