I'm hoping this can replace it.As illustrated in the inline photo, it has a hard plastic insert that allows the goggle-style face plate to fit the more customary (at the time) "curved rectangle" frame.
The frame is designed for a 7/16" exterior collar skirt, and the skirt's interior plate channel is about 1/8". In this mask, the plate channel is actually designed to hold the edge of the plastic insert rather than the glass plate. Fortunately, the insert is still good.
I would really like to dive this mask with your guidance. Alternatively, I guess I could just insert the glass plate into a goggle-style mask. Any suggestions on that would likewise be welcome.
Thanks.