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The facepiece is made of rubber coated grey canvas. The valve house is made of bakelite and has a part that allows the inhaled air to onyl go upwards so it can de-fog the lenses, it is similar to a Tissot-sytem. The other difference compared to the Gasmaske 200 are the screwed on glass eyepieces with plastic frame. The 5 point harness contains springs to give flexibility. There is two additional straps, one goes around the neck to provide better seal and a carrying strap.
German made (Dräger or Auer).
The bag of this type is almost identical to those of Dräger only the tabs and buttons are different. It has one big compartment for the mask and the filter and on the outside there is a smaller pocket for accessories like anti-fogging soap.
The mask was originally intended for industrial use and the valve house is also from an industrial mask so it is rather strange that the Bulgarian army choosed this mask. It is probably because the industrial masks (licenses) were cheaper.
The masks were made by Държавна Военна Фабрика (D.V.F. - State Military Factory).