The DV-72 MK has a malachite-inlaid rosette and malachite & pearl fret markers. The DV-73 has turquoise/coral/black onyx/nickel silver inlaid rosette and fret markers.

Only ~50 DV-73s were produced at Guild's factory in Westerly R.I.

There were ~200 DV-72s made, but most had turquoise inlay. I would guess that only ~20 were
made with malachite inlays (based on my observations of DV-72 sales over the last 8 years).