M61 gas mask
Encyclopedia
The M-61 is a Finnish gas mask
Gas mask
A gas mask is a mask put on over the face to protect the wearer from inhaling airborne pollutants and toxic gases. The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. Some gas masks are also respirators, though the word...

 manufactured by Nokia
Nokia
Nokia Corporation is a Finnish multinational communications corporation that is headquartered in Keilaniemi, Espoo, a city neighbouring Finland's capital Helsinki...

 since the 1960s up to the 1980s. It was the standard issue gas mask for the Finnish Defense Forces, but was replaced by the updated M-95 in the 1990s. It is a side loading mask (meaning the filter attaches to the side) It uses 60 millimeter threads, but adapters are available to convert it to 40 millimeter threads.

These masks are quite common on the surplus market, most filters (marked SUOD 61, suodatin is Finnish for filter) on the market have been checked by the Technical Depot of the Finnish Defence Forces in the 1970s-1980s. The weight in gram
Gram
The gram is a metric system unit of mass....

s of the filter is written on the label as before the Gulf War
Gulf War
The Persian Gulf War , commonly referred to as simply the Gulf War, was a war waged by a U.N.-authorized coalition force from 34 nations led by the United States, against Iraq in response to Iraq's invasion and annexation of Kuwait.The war is also known under other names, such as the First Gulf...

 it was thought that a properly stored filter would still be serviceable, providing the weight of the filter had not changed (which would indicate that the activated carbon had changed, taken up moisture etc.). The filters were manufactured by Kemira
Kemira
Kemira Oyj is a chemical industry group that consists of three main segments. Kemira is headquartered in Helsinki, Finland.Kemira’s main shareholder is Oras Invest Oy and its owners, members of the Paasikivi family. Its former main owner, the State of Finland, sold the largest part of its holding...

 in Vaasa
Vaasa
Vaasa is a city on the west coast of Finland. It received its charter in 1606, during the reign of Charles IX of Sweden and is named after the Royal House of Vasa...

 (now part of Scott Health & Safety, in turn part of Tyco International
Tyco International
Tyco International Ltd. is a highly diversified global manufacturing company incorporated in Switzerland, with United States operational headquarters in Princeton, New Jersey...

).

M-61 (Version 1)

Identical to the United States M9 gas mask, except for the changed exhalation valve, this licensed copy was the first of the series to be introduced.

M-61 (Version 3)

Hard plastic, integrated exhalation valve and speech diaphragm. This model has been incorrectly described as a squad leader or NCO model, whereas it is simply the final version and would have been issued to all troops, stocks permitting, in case of mobilization.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK