PONTIAC1953 Posted March 26, 2013 Share Posted March 26, 2013 i have this half moon shaped pressure gauge, pressure scale goes from 0 to 150 psi. the black knob allows you to adjust the fan shaped indicator scale that has the red, yellow, and green portion. does anyone know what this gauge was used for ?, thanks for looking, charles coker, 1953 pontiac tech advisor. Link to comment Share on other sites More sharing options...
jajolee Posted March 26, 2013 Share Posted March 26, 2013 (edited) it looks like the gauge from a AC sparkplug tester Edited March 26, 2013 by jajolee (see edit history) Link to comment Share on other sites More sharing options...
jajolee Posted March 26, 2013 Share Posted March 26, 2013 here is one Link to comment Share on other sites More sharing options...
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