In the color picture, above, the new marquetry is located from (and including) the two triangles on the left, to (and including) the two triangles on the right, and from (and including) the black band on the top to (and including) the banding on the bottom of the picture.
In the bottom picture, the mahogany rectangle, the colored banding surrounding it and the mahogany trim out to the squares, is new. The substrate was burnt down to roughly three quarters of the side's thickness, so the charcoal and bad wood was cut out and new wood glued in its place.