Original Item. Only One Available. This is a great Korean War era gas mask M9A1, still sealed in its original transit tin. This would be opened by removing the metal key on top and attaching it to the tab and opening it like a can.

The box is labeled in yellow:

MASK, PROTECTIVE,
FIELD, M9A1
FACEPIECE SIZE M
POSITION OF CANISTER STEM L
NY-2133-105

A great piece perfect for any Korean War display. Comes ready for further research and display.