Quarantine Coloring Book
The Chinese M69 was loosely based on the successful design of the U.S. M9. Many of these were exported to Vietnam for use by the NVA during the Vietnam War. This example made by Nonkinko in 1980.
Similar masks in my collection: Chinese M65, U.S. M9, U.S. M9A1, Finnish M61, Swedish Skyddsmask 51, Swedish F2, Yugoslavian M1, Serbian M2, Serbian M2F