Unlabeled key cap for the cube switches in the center console of a FIAT BERTONE X1/9 or other FIAT models of the 1980ies.
Use your own label, symbol, icon or text to individualize a switch. BERTONE switches are illuminted. Use the cut-off feature of you CAD for your label and fill it again with a separate part in white or transparent. PETG is perfect for this.