TASCAM 22-2 22-4 X-7 X-300 power switch

This is the power switch that sits at the back of the unit, its operated by along rod with a switch cap on top (separate listing)
It came out of a 22-2 but believe it will fit the 22-4 as well, its a standard mains switch so has many other applications.

I  always recommend you change the cap