Teac 22-4 opertaion SW pcb-103 5210011800

This is  from the 22-4 but it was a change from the 30 series items, its one module which  i have left as it as, as its very clean if i get a second module I will break it down for the individual knob caps etc.

I have a feeling this became the standard keypad in later models though maybe with 00-01-02 at the end