Here's    new bag made in 1957. 
Bag dimensions
 20 см *28 см
Description 
the material is the top - kirza Kirza (Russianкирза) is a type of artificial leather based on the multi-layer textile fabric, modified by membrane-like substances, produced mainly in the Soviet Union and Russia. The surface of kirza imitates pig leather.
all parts (pockets, edging, straps) - leather 

The bag has 2 main pockets:
-  larger pocket with a transparent dense elastic celluloid plate top, half a pocket covered with a thick flannel curtain
-  smaller pocket closes with a valve with two buttons 

This model has 3 features.
one . This is a brand new bag that has never been used.
2. This model of bags was banned for use in peacetime and was stored in military warehouses exclusively for a "special period"
3. This is the only model that has an original "double" lock.