Both of these training fuzes were initiated by stepping on them or tension on the tripwire, which ignited a smoke charge.
They are to be used for the VPMR-3 and VPROM-1 training mines.
The "live" versions of these fuzes are called UPMR-1 and UPROM-1.

Total length : 110mm
Maximum diameter : 60mm (prongs)
Body diameter : 22mm
Pressure / tension needed : /

Photo © M. Jochoms.