This is the Russian PMD-6 (ПMД-6), a High-Explosive-Blast (HE-Blast), rectangular, wooden, Anti-Personnel (AP), landmine that is designed to wound or kill by its HE-Blast effect also copied in China. The upper portion of the box overlaps the lower portion which contains the fuze and explosive-charge.
The fuze is one of the MUV series fitted with a winged-pin. The pin supports the weight of the upper portion of the box until a pressure of 1-10kg is added and forces the pin out of the fuze. The specifications for this landmine are not fixed because it is often produced in the field using locally available materials. The PMD-6 can be located using metal-detectors under most field conditions. It can be defeated by blast-overpressure from explosive breaching systems.
A Chinese produced wooden box landmine designated the Type 59 is similar to the Russian PMD-6 wooden box AP landmine, except the entire fuze is contained within the box.