This Tektronix 370 Curve Tracer powers up and passes it's self test but most of the buttons don't work. The rotary knobs do work however. It was working, but the buttons started failing over time. Also some of the lever switch handles are broken. From looking on the web, the switches behind the buttons are easily available. The lever handles may be hard to find, or could be 3D printed. Also missing is the protective cover (over the test terminals) but the interlock is easily bypassed.
It would be a very nice curve tracer when fixed. Also, It may be possible to control it through the IEEE 488 port and leave the front panel as-is.