- Indicator TESATRONIC TTD20 with scale display
- Compact instrument with scale display and measurement classifications
- Switchable between metric and inch measuring system.
- Convenient setting of the display by manual zero adjuster
- 2 probe connections for single, sum and difference measurements
- Indication of the class affiliation of the measured values by luminous diotes,
green = "GOOD", yellow = "Rework", red = "Rejects".

Year of manufacture: unknown