Products can be returned within 30 days from the date you receive it, subject to the fulfilling Distributor's acceptance of your return request. Please work with the Distributor on resolution before going to your bank or credit card to dispute the charge. Products purchased via the 3M Marketplace can be returned only to the fulfilling Distributor, and only through the 3M Marketplace. It was made in several colours but the difference is minor.Incidents and Returns can be raised for one of the following reasons: damaged item, item not received, item not as ordered, delivery took longer than expected, general issue, or I want to return the product. The bag has 3 straps: one on the shoulder and two for fixing around the waist. Simple canvas bag with 2 smaller parts in the lower section. Later when the 70M filter was released the mask was issued with the 70M filter and PV-75M bag (or just called 75M, the same as on the 75M) to the civilians. 59mm anti-fog inserts (圆) (or sometimes anti-fog soap).For carrying it has an adjustable shoulder srtap and an also adjustable waist strap connecting with a carabiner to a D-ring. The little pocket is for the antifog inserts. There are 2 strips on the inner side of the filter part to fix the hose during use. The two same-sized parts are for the filter and the mask. Inside there are 3 sections and 1 little pocket. This set was used by the registered and non-registered members of the Civil Defence. Originally it was issued with a hose and the 60M filter with the 51M or 60M bag (the bag of the 51M mask). It was issued with a hose and a big flat box filter (the same as on the 60M) and also with a lightweight filter which is similar to the filter issued with the Soviet PMG series ( 70M filter). The valve housing is the same as on the 60M, with the exception of the missing tubes for the Tissot-tubes. There is a carrying strap on the bottom back of the mask and a chinstrap inside as well. The third part near the bottom would be wrapped behind the neck of the user and hooked to the left side of the mask to provide a tight seal and to prevent accidentally taking off the mask. On the nape the temple straps and the strap of the roller frame are hooked up to a metal piece which is riveted to a leather pressure equalizer rectangle. The middle forehead straps is hooked over a metal roller frame and sewn to the outer forehead straps, so these can slide freely and automatically adjusts to the shape of the head. Elastication is done by 3 springs in each strap, save for the neck strap, there are only 2 springs in that. The 7 pointed, adjustable and elasticated harness is composed of three pieces and connected to the facepiece trough adjuster buckles, which are sewn to the facepiece. These assemblies and the crimped ring are the same as on the 34M, but, are a bit larger in diameter. There are masks with 75M syled lenses, these are later production masks from the arly 1970s. The glasses and the anti-fogging insert fixing rings, which are the same like on the 60M, are crimped to metalic copper colored steel alloy assemblies which are pressed to the faceblank permanently. It seals on the face via 4cm wide goat leather stitched to a rubber-coated canvas verge and folded out to the outside of the mask, but unlike its predecessor, the 34M, the sealing of the stitching is sealed inside. It is a full face mask made of a single sheet of rubber-coated dark green canvas formed by 3 seams, 2 on the forehead and one on the chin.
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