Quarantine Coloring Book
The Swedish Skyddsmask 51 was a licensed copy of the U.S. Army M9/M9A1 Field Protective Gas Mask. This example was made in 1958.
Skyddsmask = "Protection Mask"
Similar masks in my collection: U.S. Army M9, U.S. Army M9A1, Finnish M61, Swedish F2, Yugoslavian M1, Serbian M2, Serbian M2F