MIL-L-16225B (AMENDMENT-1), MILITARY SPECIFICATION: LOUDSPEAKER, PERMANENT MAGNET, BLASTPROOF AND SUBMERSIBLE, NAVY TYPE 49546( ) (06-SEP-1979) [S/S BY MIL-DTL-16225C]
MIL-L-16225B (AMENDMENT-1), MILITARY SPECIFICATION: LOUDSPEAKER, PERMANENT MAGNET, BLASTPROOF AND SUBMERSIBLE, NAVY TYPE 49546( ) (06-SEP-1979) [S/S BY MIL-DTL-16225C].