Skip to Content
You searched for
Search
Creator Coleman Electric Co. (Maywood, Ill.) Remove constraint Creator: Coleman Electric Co. (Maywood, Ill.) Date 1938 Remove constraint Date: 1938

Search Constraints

Search Results

    • 1938

    Self contained pH meter with wooden exterior; hinged top door opens to reveal meter face and inlaid paper instructions for use; the double scale reads pH and millivolts; hinged door on left side of wooden case opens to…