These are spline shaft knobs. I think an early stop will be at Home Depot where I will "demo" a micrometer so I can measure the ID of the knob. The thing about this is that picture shows a "center" knob that slides down onto the spline and seats onto a second knob because the back control is for the effects return.

Here's a look. Stereo!




Last edited by eddie1261; 07/25/21 01:23 PM.