This
mask is probabely the first model of the serie of FM 3 masks.
The
facepiece is made of moulded rubber including, in the moulding, the head
harness hooks, It has not Tissot vents. The outside of the masks presents a
raised cross-hatching moulded on the brow and the
cheeks.
The
design of the chin part of the mask includes a kind of lip preventing the
chin to slide against the frontpiece, this arrangment diappear on the
following FM 3 masks.
The
frontpiece is made of flat cast light alloy and includes the filter
connection screwing and at the lower part, the exhalation valve housing.,
It has not a Tissot déflector
The
exhalation valve is the same as on the FM 1 serie.
The
eyepices are made of Triplex glasses and tightened on the facepiece by
means of bare aluminium crimped rings.
The six-point head harness is made of elasticized straps and adjusting buckles.
