The Arnold & Son HM Perpetual Moon is for sure the nicest moon phase indicator watch in the market. Well, just as if it wasn't stunning enough, the brand released this new iteration during Baselworld 2019. The new HM Perpetual Moon Aventurine is now sporting a beautiful sparkly Aventurine dial. Fitted with the biggest moon phase indication in the market, the Arnold & Son HM Perpetual Moon displays the moon as seen from the northern hemisphere on a wide spread aperture that spans from 10 to 2 o’clock on the dial.