U.S. Air Force MBU-5/P Oxygen Mask & HGU-7/P Flight Helmet

The U.S. Air Force MBU-5/P Oxygen Mask used a "quick don" lever to easily remove and replace it while keeping it attached to the helmet.  Shown here paired with the HGU-7/P Flight Helmet, it was used by crew members of F.A.C., cargo, trainer and tanker type aircraft throughout the Cold War.  The helmet was issued with a snap-on visor that was generally disliked and discarded by pilots.  This MBU-5/P was made by Sierra in 1962.

DEVELOPMENT

 

Similar masks in my collection:  U.S. Air Force MBU-13/P

Rubber stamps
Rubber stamps

Manufacturer and patent stamps on mask release "Sierra (R) ENG. CO. PAT. PEND. FSN 1660-973-4344"

Rubber stamp
Rubber stamp

Date stamp on nose cup "60/61/62"

Rubber stamps
Rubber stamps

Model, size, and part number stamps under chin "FACEPIECE, MASK, OXYGEN MBU-5/P MIL-M-27274 (USAF) SIZE - REGULAR NARROW PT NO. 450-05 UC FSN 1660-794-0855"

Rubber stamps
Rubber stamps

Model, size, and part number stamps under chin "FACEPIECE, MASK, OXYGEN MBU-5/P MIL-M-27274 (USAF) SIZE - REGULAR NARROW PT NO. 450-05 UC FSN 1660-794-0855"

Regulator connector
Regulator connector

Stamps on regulator connector "CONNECTOR, OXYGEN MASK TO REGULATOR MIL-C-26522A (USAF) AF 34-601-12957" "Sierra (R)" "PT/No 266-402" "TYPE CRU-8/P 1660-00-082-8909"

Microphone
Microphone

Microphone inside mask "MICROPHONE ELEMENT - MIOI/AIC" "FRONT"

Microphone cable
Microphone cable

Microphone cable plug "U-173/U"

Microphone cable
Microphone cable

Microphone cable plug "R/C"

Earphone shell
Earphone shell

Stamps on earphone shell "SHELL EARPHONE ROANWELL" "FRONT"