BN- T5 Gasmask, RKKA issue, some approval stamps WW2 issue

[Dimas]

BN-T5 gas mask, filter with valve system based on the down part, especially for this type gasmask- T5, due of only one valve on the mask. Originally the mask produced in early 1930 year's, the type of eye glasses system is early variant, stamps on the canister and mask is visible, it's a approval stamp-" ready to use", dated 1942 year. The mask is in size 2, F 82 is branch number. The filter system is BN-T5 type with valve on it.