Tarpaulin sergeant bag-tablet of the Red Army.
It was used from the 30s of the 20th century until the end of the existence of the USSR.
It has 2 internal compartments for maps, stationery, orientation aids.
It can be worn both on the waist belt (using the loops on the inside) and over the shoulder (using the shoulder strap).
Today it is used for military-historical reconstruction and filming of feature films and television programs.