Swedish NBC Respirator F2
The Swedish NBC Respirator Forsheda F2 was designed to replace the Skyddsmask 51, and was designated Skyddsmask 90 by the military. This example was made by Forsheda in 1992.
Skyddsmask = "Protection Mask"
Similar masks in my collection: Swedish Skyddsmask 51, U.S. Army M9, U.S. Army M9A1, Finnish M61, Yugoslavian M1, Serbian M2, Serbian M2F