The Triplex glass eyepieces are tightened by screwing rings and allow then to be changed if necessary.
The exhale valve is contained in a aluminium casing in front of the mask.
A six points rubber
straps head harness complete the mask
| S BELGE de L’ AZOTE OUGREE Civilian Defense about 1934 | |
|
The
rubber shaped moulding of this mask is a quite modern design
The Triplex glass eyepieces are tightened by screwing rings and allow then to be changed if necessary. The exhale valve is contained in a aluminium casing in front of the mask. A six points rubber
straps head harness complete the mask |