An M.S.A. Mining Methanometer

An M.S.A. Mining Methanometer.
An M.S.A. mining methanometer type D6.

Made from plastic. Size 6″ x 2 1/2″ x 2″.

Used for checking for methane gas below ground. Used with an extension a telescopic extension probe and rubber bulb, the probe would screw into the top of the detector which is situated under the yellow cap.

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