T 33 mask ( Pirelli )

This long serie of masks are all of the same general flat moulding design as the M 31 serie.

The beige, grey or brown rubber facepiece includes two triplex glass eyepieces, tightened by crimped rings. The eyepieces have inside spring retainers for anti mist screens

There are no difference between the T 33 and the T 35 but some of T 35 have the position of the exhale valve casing on the front piece highier, allowing to have the filter more straightened up.

The filter is directly screwed to the mask by means of metallic fitting including the inhale valve located at the bottom of the facepiece.

PC 35 ( I.A.C.)
	This masks have been issued with a small transportation bag equiped with a shoulder strap

T 35 ( I. A. C.)
	The five points head harness is made of canvas straps and rubber springs The only difference seen between the T 35 and the PC 35 is the marking on the left side of the facepiece moulding. Several filters have been issued for the military and the civilian masks. The civilian are generally paint in yellow

IAC hooded mask
	An industrial hooded mask has been issued on the base of the T 33 and later on the T 55 mask by sewing and gluing a hood around the edge of the facepiece of the mask.