Rcsa, I couldn't see your image but found this:
https://www.pinterest.com/pin/506655026806794814/
The one on the right though mine was a smooth plate, angled on both sides and the crosses as shown but without t h e circles.
Vision wise they were superb Zorro masks. As fire masks I don't know. The black metal would get hot, the eye slits were open to smoke, the backing was Sorbonne rubber and, I imagine could melt.