U.S. Air Force MBU-13/P Chemical-Biological Oxygen Mask
![](https://static.wixstatic.com/media/385e75_a0b673f9c977415884d1618681b02719~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_a0b673f9c977415884d1618681b02719~mv2_d_2808_2808_s_4_2.jpg)
![](https://static.wixstatic.com/media/385e75_3034a1db79854ece96db02025b699ac0~mv2.gif)
The U.S. Air Force MBU-13/P Chemical-Biological Oxygen Mask was usually paired with the HGU-39/P helmet. It was issued with a tinted visor with velcro fasteners, and a sock to protect the visor when not in use. This example was made by Scott in 1984.
Similar masks in my collection: U.S. Air Force MBU-5/P, MSA ClearVue Model "S", MSA ClearVue Chin-Type, Scott Industrial, Scott Chin Style
![Label](https://static.wixstatic.com/media/385e75_c80ccab019a84f4291a5e3e7b7e2c563~mv2.jpg/v1/fill/w_147,h_24,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_c80ccab019a84f4291a5e3e7b7e2c563~mv2.jpg)
"MASK, CHEMICAL-BIOLOGICAL-OXYGEN 07878/76211 92114 SCOTT PN 651-475-1"
![Serial number](https://static.wixstatic.com/media/385e75_05dbffa6a51f4974bab100b470f223b2~mv2.jpg/v1/fill/w_147,h_31,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_05dbffa6a51f4974bab100b470f223b2~mv2.jpg)
"SERIAL NUMBER 41984"
![Rubber stamps](https://static.wixstatic.com/media/385e75_ef70898f483c45eab3facb3fafc7ea0d~mv2.jpg/v1/fill/w_139,h_126,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_ef70898f483c45eab3facb3fafc7ea0d~mv2.jpg)
Manufacturer, date, and part number stamps on cheek "MFR 92114" "83/84/85" P/N 551-11-19"
![Rubber stamp](https://static.wixstatic.com/media/385e75_e4ebc1ca2a9e4c7bb05dde5a766e7ede~mv2.jpg/v1/fill/w_147,h_81,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_e4ebc1ca2a9e4c7bb05dde5a766e7ede~mv2.jpg)
Manufacturer stamp on forehead "SCOTT ATO"
![Rubber stamp](https://static.wixstatic.com/media/385e75_fea1af0c606946bda6844ed9d475bb00~mv2.jpg/v1/fill/w_111,h_111,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_fea1af0c606946bda6844ed9d475bb00~mv2.jpg)
Date stamp on nose cup "81/82/83"
![Stamps](https://static.wixstatic.com/media/385e75_bda1a99009d54592aebb5df947f06d42~mv2.jpg/v1/fill/w_144,h_216,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_bda1a99009d54592aebb5df947f06d42~mv2.jpg)
Stamps at top of hose "NEXUS 79A/U" "266-632" "SCOTT ATO"
![Hose stamp](https://static.wixstatic.com/media/385e75_b9de5fb8ee194c54a645aa4104ac2888~mv2.jpg/v1/fill/w_125,h_86,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_b9de5fb8ee194c54a645aa4104ac2888~mv2.jpg)
Stamp on hose "100"
![Hose stamp](https://static.wixstatic.com/media/385e75_423e670a79f14cd9b2bc0a5320595299~mv2.jpg/v1/fill/w_123,h_85,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_423e670a79f14cd9b2bc0a5320595299~mv2.jpg)
Manufacturer stamp on hose "SCOTT ATO"
![Hose stamp](https://static.wixstatic.com/media/385e75_8f7adc47a5584b1c8fa516a09897b152~mv2.jpg/v1/fill/w_159,h_159,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_8f7adc47a5584b1c8fa516a09897b152~mv2.jpg)
Manufacturer stamp on hose "SCOTT ATO"
![Communications cable](https://static.wixstatic.com/media/385e75_a52614c01404433491555b515d89e772~mv2.jpg/v1/fill/w_101,h_73,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_a52614c01404433491555b515d89e772~mv2.jpg)
Top of communications cable "ASTROCOM"
![Communications cable tip](https://static.wixstatic.com/media/385e75_a0c5c3759e2b43e6803c9a4dea998621~mv2.jpg/v1/fill/w_147,h_37,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_a0c5c3759e2b43e6803c9a4dea998621~mv2.jpg)
End of communications cable "U/173/U" "CORD CX-4707C/AIC" "18068"
![Communications cable tip](https://static.wixstatic.com/media/385e75_f3ba65d5e2c4461bb9c32a65d4427778~mv2.jpg/v1/fill/w_147,h_32,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_f3ba65d5e2c4461bb9c32a65d4427778~mv2.jpg)
End of communications cable "ASTROCOM" "10438A"
![Protective cover](https://static.wixstatic.com/media/385e75_c09dba103f634728bcd38445eab1863e~mv2.jpg/v1/fill/w_147,h_191,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_c09dba103f634728bcd38445eab1863e~mv2.jpg)
Cloth cover to protect against scratches when not in use "STRETCH"