This unit is in nice physical shape, and it powers up, takes readings, holds them, and seems to work nicely—until you press the F1 button. Then the display image fractures and is largely unreadable. And since the F1 key is critical to the unit’s operation, that is problematic. But if you can live without the F1 button, or if you can fix it, here’s a nice piece of kit.
The lot includes the electronic unit with power cord, manual, hold pedal, water cell, water reservoir, four calibration volumes, a clamp, and two vinyl covers.
As for the two model numbers in my title, the face says 7140, and the label on the back says 7141.