a nice civilian one.
Thanks for your input Harry, I appreciate it!
I've been told by a couple of other collectors that this is one of two things: On person that I personally know, Chip Minx, who is a highly knowledgeable and respected advanced collector says this is an "Übungsmaske" (training exercise gasmask) because of the red color rings to the eye pieces mean it is a training gasmask. Another person has told me that this is a "GM15 with what seems to be a Dreischichteneinsatz 11/11".
Am I correct in saying the "Rufungstelle" marking inside the mask translates to "recall site"?