Recently acquired a second 3S mask. One by Auer, one by MSA. The Auer mask carries far less markings compared to the MSA, but Auer is mentioned on both masks. : r/gasmasks
Meine Schutzmasken – RGEMaster
MSA Auer 3S : r/gasmasks
MSA Auer Full Face Mask 3S-PS-MaXX Silicone 10031388 | Full masks | Head protect | Clever-AS-Technik - Industrial safety