MIL-M-25990 › Complete Document History
Mask, Oxygen, Type MBU-4-P (Superseded by MIL-M-7585)


Obsolete Revision Information:
   NOT - MASK, OXYGEN, TYPE MBU-4-P #SU - April 8, 1966
   BASE - MASK, OXYGEN, TYPE MBU-4-P #SU - March 11, 1964
   AMENDMENT 3 - MASK, OXYGEN, TYPE MBU-4-P #SU - Jan. 1, 1960