Quarantine Coloring Book
The Yugoslavian М1 was a direct copy of the U.S. Army M9/M9A1 Field Protective Gas Mask. This example was made by Милоје Закић in the 1980's.
Милоје Закић = "Miloje Zakić"
Similar masks in my collection: Serbian M2, Serbian M2F, U.S. Army M9, U.S. Army M9A1, Finnish M61, Swedish Skyddsmask 51, Swedish F2, Chinese M69