MSA Model 2A Explosimeter Combustible Gas Indicator 13791

  For sale is a MSA (Mine Safety Appliances Co.) Model 2A Combustible
  Gas Indicator, Serial No.77528.  Labeled: Part No.89220.  Measures
  0 to 100% explosive gases in a contained volume.  NOTE: I am not able
  to test this item, but it appears to be in good condition, with no
  external damage.

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