Ap Produced by SJ .F4 Genuine Moissanite! Audemars Piguet ADF4 Royal Oak 15400 Diamond Set Starry Sky Series Video .Luxurious to the extreme! Very limited stock available! Starry Sky Moissanite version, the entire watch is meticulously hand-set with D VVS grade Moissanite diamonds. All stones can be tested with professional testing pens. Moissanite diamonds (refractive index 2.65-2.69 compared to diamond's 2.42) exhibit the same brilliance as diamonds, with even stronger fire and sparkle. Their hardness is second only to diamonds. The setting technique used is a flower setting, which is different from the processing methods commonly found in the market, achieving a very dense arrangement of stones with no gaps. This addresses many customers' concerns regarding stone tightness. Made from L stainless steel, the watch head measures 40MM, featuring a sapphire glass mirror, paired with a customized Cal. automatic movement. High-end luxury, we welcome all watch enthusiasts to appreciate it. S1 finely recommends this men's mechanical watch.