Extremely difficult to find these days

This is the equipment AC Power ON-OFF switch with a long actuator shaft, complete with knob and panel sleeve
AC Power switch
DPST
Rated: 3A 250V AC
Push on – Push off (spring with locking)
Model: ESB70702V
Bracket mounting with 20mm threaded hole spacing – bolts are also supplied
Even if the actuator is not needed, these switches have a habit of the locking mechanism failing so this switch would be a handy replacement
Actuator
This is a long tubular shaft, one end fits into the “head” of the AC power switch and the other end has the front panel knob on it
Shaft material is aluminium
Shaft length is 229mm long – this can easily be shortened if necessary
The shaft is held in place at the switch by a hex bolt (included)

Commonly used in test equipment of the 1980’s where the power switch was physically located close to the power switch but the ON-OFF button is located quite some distance away at the front panel.