MSA All-Vision Diaphragm ChemOx Rebreather Mask
![](https://static.wixstatic.com/media/385e75_34f49657dc0a4e3184633b5ac3d52095~mv2_d_2808_2808_s_4_2.jpg/v1/fill/w_600,h_600,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/385e75_34f49657dc0a4e3184633b5ac3d52095~mv2_d_2808_2808_s_4_2.jpg)
![](https://static.wixstatic.com/media/385e75_1b6ae6c33979467899c0fad1f542185f~mv2.gif)
The MSA All-Vision Gas Mask was made for a variety of applications, including law enforcement and industrial use. This MSA Diaphragm Gas Mask, had two cheek exhale valves, a central speech diaphragm, and was used with a ChemOx rebreather system. This example was made by Mine Safety Appliances in the 1958.
![Stamp](https://static.wixstatic.com/media/385e75_e13a1da2e6354cd68cf28fa9b44d667f~mv2_d_2520_2520_s_4_2.jpg/v1/fill/w_147,h_147,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_e13a1da2e6354cd68cf28fa9b44d667f~mv2_d_2520_2520_s_4_2.jpg)
BoM stamp on temple "BUREAU OF MINES APPROVAL 1309 MSA
![Stamp](https://static.wixstatic.com/media/385e75_6ad11163468c44b2a7a4a68463feef46~mv2_d_2304_2304_s_2.jpg/v1/fill/w_147,h_147,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_6ad11163468c44b2a7a4a68463feef46~mv2_d_2304_2304_s_2.jpg)
Manufacturer stamp on cheek "M-S-A"
![Stamp](https://static.wixstatic.com/media/385e75_0ffa76cdd08d4a4ead88566d2209c232~mv2_d_2520_2520_s_4_2.jpg/v1/fill/w_147,h_147,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_0ffa76cdd08d4a4ead88566d2209c232~mv2_d_2520_2520_s_4_2.jpg)
Manufacturer stamp on cheek "MSA"
![Stamp](https://static.wixstatic.com/media/385e75_fd7b640584924f939d308e483dc5e24d~mv2_d_2880_2304_s_2.jpg/v1/fill/w_147,h_118,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_fd7b640584924f939d308e483dc5e24d~mv2_d_2880_2304_s_2.jpg)
Stamp under chin "(?)"
![Stamp](https://static.wixstatic.com/media/385e75_ae2c4fa0cdf94673b58e2f6bf607703a~mv2_d_2160_2160_s_2.jpg/v1/fill/w_147,h_147,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_ae2c4fa0cdf94673b58e2f6bf607703a~mv2_d_2160_2160_s_2.jpg)
Stamp on chin "MSA (?) 33 21 (?)"
![Rubber stamp](https://static.wixstatic.com/media/385e75_9d171b9a2f96473e8a62e1a7c8fb1373~mv2_d_3312_2160_s_2.jpg/v1/fill/w_147,h_96,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_9d171b9a2f96473e8a62e1a7c8fb1373~mv2_d_3312_2160_s_2.jpg)
Date stamp inside mask "56/57/58"
![Rubber stamps](https://static.wixstatic.com/media/385e75_0b084bf581684331b6398152dbdb1d60~mv2_d_2880_2160_s_2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_0b084bf581684331b6398152dbdb1d60~mv2_d_2880_2160_s_2.jpg)
Manufacturer and patent stamps on head harness "MINE SAFETY APPLIANCES CO. PITTSBURGH, PA." "FRONT STRAP TO BE PULLED LAST" "PATENTED NOV. 1, 1921"
![Canister](https://static.wixstatic.com/media/385e75_bf3beebf50814aeabe8437c34a2f66f3~mv2_d_3024_1440_s_2.jpg/v1/fill/w_147,h_70,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_bf3beebf50814aeabe8437c34a2f66f3~mv2_d_3024_1440_s_2.jpg)
ChemOx canister top view
![Canister](https://static.wixstatic.com/media/385e75_f68513fb4cb74923be9100813be42b39~mv2_d_2160_2736_s_2.jpg/v1/fill/w_147,h_186,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_f68513fb4cb74923be9100813be42b39~mv2_d_2160_2736_s_2.jpg)
ChemOx canister front view "PERMISSIBLE QUARTER HOUR CHEMOX OXYGEN GENERATING CANISTER "
![Canister](https://static.wixstatic.com/media/385e75_99c28dcfa23946f4ae50b3e3024d51ba~mv2_d_2304_2736_s_2.jpg/v1/fill/w_147,h_175,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_99c28dcfa23946f4ae50b3e3024d51ba~mv2_d_2304_2736_s_2.jpg)
ChemOx canister back view "THIS SIDE TOWARD YOU"
![Carrier](https://static.wixstatic.com/media/385e75_e8a2b10409d2407989bc92b5ad7aeeda~mv2.jpg/v1/fill/w_147,h_108,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_e8a2b10409d2407989bc92b5ad7aeeda~mv2.jpg)
Box for "M.S.A. - CHEMOX OXYGEN BREATHING APPARATUS" "BUREAU OF MINES APPROVAL 1307"
![Instructions](https://static.wixstatic.com/media/385e75_f22f8c6f70f340dcb6cc85476b82edd4~mv2_d_2592_2376_s_2.jpg/v1/fill/w_147,h_135,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_f22f8c6f70f340dcb6cc85476b82edd4~mv2_d_2592_2376_s_2.jpg)
Instructions for use and maintenance inside box lid