U.S. Army ABC-M24 Chemical-Biological Aircraft Mask
The U.S. Army ABC-M24 Chemical-Biological Aircraft Mask was based on the earlier U.S. Army M14 Tank Mask design. The main difference was the M24 used a male microphone attachment, and the M14 used a female attachment. This example was made by ILC Dover in 1981.
Similar masks in my collection: U.S. Army M25A1
Size stamp on forehead "US M"
Manufacturer and date stamps on cheek "81 IDL 2E 38" "M6 C2"
Lot stamp on cheek "PB 82E 016 550"
Manufacturer and date stamp on exhale valve cover "81 IDL 2E38" "M1-C2"
Manufacturer and date stamp on nose cup "81 IDL 2E38"
Size stamp and microphone stamps inside nose cup "M" "MICROPHONE DYNAMIC M-133/U" "ELECTRO-VOICE, INC. U.S."
Filter model stamp top view "US M10A1"
Filter lot stamp top view "LOT NO MSA-1-15
Filter bottom view