MIL-M-87163A (NOTICE 1), MILITARY SPECIFICATION: MASK, OXYGEN, MBU-12/P (1 SEP 1997)

MIL-M-87163A (NOTICE 1), MILITARY SPECIFICATION: MASK, OXYGEN, MBU-12/P (1 SEP 1997)., This notice should be filed in front of MIL-M-87163A (USAF), dated 18 February 1983. MIL-M-87163A (USAF) is inactive for new design and is no longer used, except for replacement purposes.