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