MCU-2P Respirator

United States army MCU-2P respirator produced by MSA.
Vary hard to get a hold of US military masks outside of the US, the straps are missing however and need replacing.

Unknown PACT Respirator - Possible GM38 clone

I got this mask off of eBay on a bid and it was advertised as a NATO mask.
It turns out its most likely a PACT mask due to the filter and writing inside of the mask.
AZ or A2 is stamped on the forehead of the mask and inside is stamped 1982.
The mask appears to be a GM38 style mask covered in a canvas like material, any info on the mask would be appreciated.

Polish OM14 Respirator

Polish OM14 Respirator with a large EO14 filter.
The mask is very similar to the East German SCHM41 in terms of design and filter type. The differences being the OM14s filter is more of a water canteen shape and the metal on the inhale/exhale valve is a different material. The mask also appears to be actually white where most GP5 style masks are light grey.
The mask was used by Poland during the Cold war.

Czech CM4 Respirator

Czechoslovakian CM4 Respirator from the late cold war (Mask stamped 1984).
It uses a 40mm filter thread and has a decent voice diaphragm and exhale valve, it also has triangular lenses. It seems like it was introduced to replace the M10m or the Model Z respirator as it's a more modern design compared to the other two.
The mask visually looks like the West German M65 and also came in a bag with German writing on it.

Belgian BEM 4GP Respirator

Belgian BEM 4GP combat respirator designed for the Belgian army during the 1990s. Avon undercut the costs for producing this mask and the Belgian army then adopted Avon series masks such as the FM12.
The 4GP is one of the best masks on the surplus market and has now been issued to many countries riot police and is also available for civilian purchase.
The mask allows you to switch the position of the filter, by default it is straight down but it can be switched to either the left or the right depending on helmet shape and if the shooter is left or right handed.

Soviet MM1 Respirator

A mask designed in the 1950s for Tank Crews, it uses two front lenses a voice diaphragm and takes a filter using the GP5 intake/outtake valve at the bottom of the mask.

Czech Model Z/Polish MC1 Respirator

The Czech Model Z and Polish MC1 are identical masks. I'm unsure which I own but I think it may be the Polish model, it's quite similar to the French M51 in design.
It takes 40mm filters.

French M51 Respirator

French M51 Respirator by ANP, this is the Belgian export model.
The M51 was an early Cold War respirator that took 40mm filters and had a basic voice diaphragm built in the exhale valve.

British CT12 Respirator

British CT12 Respirator made by Avon and based on the S10 design, exported to many European countries. The CT12 has a removable filter plug that acts as a voice diaphragm so the filter can be installed on either side of the mask.

British S10 respirator

The S10 replaced the SR6 in service in the late 80s in the British army.
The mask is made by Avon and takes 40mm filters, a radio can be attached to the secondary voice diaphragm on the right cheek of the mask.