I sawed some 5/64″ (2mm) thick walnut veneer and glued it, book-matched, onto some pine. The patterns were then drawn onto the veneered boards and the frets cut out.
The edges of the frets were usually back-bevelled to reduce their visibility when viewed front-on or slightly off-centre. The effect makes the frames appear lighter.
The cross-banded frame stock has all been glued up and awaits moulding… soon.