Sylvania Electric Vacuum Tube Polymeter Type 221Z Tested and working multimeter

Description

Here is a Sylvania Electric Polymeter Type 221Z. This is a vacuum tube multimeter. From around 1951, it is working nicely, easy to calibrate. Comes with 1 set of alligator clips and screw on contact. Tested it on D.C. current as you can see by the photo's. Thanks for looking. Any questions please ask. WE ARE THE MUDLARKS, we keep diggin' so you don't have too
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