one of my rarest piece in collection. Gp-4 gas mask (not gp4u) size 2 dated 1953 made in moscow. condition is great but mask is kinda crumpled : r/gasmasks
Unused Rare Gas Mask. Soviet Gas Mask "Gp 4" Scary Gas | RebelsMarket
GP-4 | Gas Mask and Respirator Wiki | Fandom
Surplus Soviet Gas Mask GP4 Civilian NBC Protection Filter Case Russia - Survival General