Testing a Türlen Test Dial Indicator 7 Jewels "High Precision" for repeatability

In this video I'm testing a jungle site special, this "Türlen Test Dial Indicator 7 Jewels High Precision 0.0005" 0-15-0" for repeatability. The test is simple. The vise (not trammed in) is holding a cheap precision ground parallel. It has a black mark on it indicating zero position. The indicator should return to zero with each sweep at the same spot on the parallel.