MSA All-Vision Chemical Cartridge Respirator
The MSA All-Vision Gas Mask was made for a variety of applications, including law enforcement and industrial use. This configuration was called the All-Vision Chemical Cartridge Respirator. It had two cheek exhale valves and a filter canister attached directly to the chin to protect against tear gas. This example was made by Mine Safety Appliances in 1969.
Date stamp inside mask "68/69/70"
Instruction and date stamps on head harness "FRONT STRAP TO BE PULLED LAST" "69/70/71"
Stamp on tip of head strap "FRONT"
Stamp on tip of head strap "SIDE"
Stamp on tip of head strap "NECK"
Manufacturer stamp on metal clamp "Sure-Tite ALL STAINLESS" "48 2"
Manufacturer stamp on clamp fastener "WHITTEK MFG. CO. CHI. U.S.A."
Filter sleeve bottom view
Pre-filter top view