This is a beautiful working example of one of the finest tube-testers ever built. It is one of the last of the great Hickoks and has been very lightly used. The roller tube-chart functions properly and has the test-data for many modern tubes not seen on other testers, such as 5687, 5755, 5670.
Mitutoyo Absolute Digimatic Caliper 0-150mm / 0-6"... A digital caliper equipped with standard outside and inside jaws. Hardened stainless steel construction and equipped with ABSOLUTE System scale for error free, high-speed measurement.
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