Antitank stickgrenade with a hollow charge.
The thin sheel steel had a wooden stick that held a spring-loaded cover, kept in place by the safety pin.
After removing the safety and throwing the grenade, this cover would be released and a cloth tail unfolded to give the grenade a stabile flight.
With this, a second safety fell down and the charge would ignite on impact.
The grenade could penetrate 95mm steel.

Total length : 383mm
Diameter : 93mm
Weight : 1200gram
Filling : 700gram TNT

Possibly Yugoslavian poduced :