QC should check black dial uniformity, day and date alignment, hand clearance, fluted bezel symmetry, President link finish and clasp operation. Request close, well-lit views of those points and compare them with the approved gallery sequence. The final check should make the exact offered configuration easy to identify before it leaves the workshop.
The black dial makes this Day-Date a strong contrast option for buyers who prefer a quieter color story. The day and date windows become the natural focal points, while the fluted bezel and President bracelet preserve the recognisable formal outline. It is less decorative than a patterned dial and warmer in presentation than a steel Datejust. Use the close views to confirm dial uniformity, hand clearance and the fit of the bracelet around the case.
A plain black dial is valuable precisely because it does not compete with the other Day-Date signals. It lets the day/date display, fluted edge and President bracelet establish the formal character without adding a pattern or stronger color. That makes it a useful choice for buyers who want a watch that can move between darker clothing, business settings and evening wear. The QC set should make the black surface look even rather than washed out, especially around the date aperture.