U.S. Army MI-I-5 Optical Gas Mask
The U.S. MI-I-5 Optical Gas Mask was developed by the Army for use with optical sighting devices. The distance between the small circular eyepieces could be adjusted to accomodate different instruments and head sizes. The filter clips to the head harness behind the user's head, with two hoses drawing air up towards the eyepieces. It was produced in both black and gray (green) rubber. Both of these examples were made by Acushnet, in 1940 and 1941 respectively.
Manufacturer and date stamp on chin of black MI-I-5 "LOT 75 Acushnet M6 10-40"
Stamp on flutter valve of black MI-I-5 "N-2 CR Co 1-41 227"
Manufacturer and date stamp on chin of green MI-I-5 "Lot W109 Acushnet M2 1-41"
Stamp of flutter valve of green MI-I-5 "O S P-86-1 2-41"
Bag for "Optical Gas Mask M1"
Markings on inside flap of bag "E II R2 E.A.E. LOT 53"