Chinese TF-1

The Chinese TF-1 was a copy of the Soviet ShM-41M, but used a gray plastic assembly and had larger eyepieces.  It was used for industrial purposes.  This example was made by Nonkinko.

Similar masks in my collection:  NVA/Soviet ShM-41M, Bulgarian ShM-41u, Russian ShM-62u, Polish ML, Polish MUA, Polish OM-14