GP-5 gas mask is a Soviet-made single-filter gas mask. It was issued to the Soviet population starting in 1962; production ended in 1990. It is a lightweight mask, weighing 1.09 kg (Wikipedia) https://en.wikipedia.org/wiki/GP-5_gas_mask This model was made by hand without mesurements. scale and parts vary from actural GP-5 sizes and shapes. Fre…