r/gasmasks - Is this a GP-7VM? - reddit.com
141. Posted by. u/commanderchemicals23. 4 months ago. 1988 dated M40 Chemical Biological Protective Mask. This example is one of the early Scott procured M40's after the finalization of the M40 in 1987. Scott would soon lose the contract in 1990 with all production going to ILC Dover and MSA. 1 / 6. 141.