TEAC Model 2 2A 3 and some others Mixer pushbutton

These were used on the Teac Model 2 Teac Model 2A Teac 3 and possibly the 5 , very rare now as many people restoring this mixer as it has some very good mike pre-amp transformers giving a nice sound

These have the ridges on the top others were plain

The Grey and white tend to go a smokey colour