Taking the HM Perpetual Moon to higher heights, Arnold & Son offers three very distinct versions for today's discerning clientele. The Elegant model - the present version - is created in 18-carat red gold with an incredible blue guilloché dial in a stylized sunray pattern, blue guilloché moon disc with golden stars and the hand-engraved moon. The Classic model, also crafted in 18-carat red gold, features a cream-colored dial with a blue guilloché moon disc with golden stars and the hand-engraved moon. The Modern model is created in stainless steel and features a black guilloché dial with black guilloché moon disc with the hand-engraved moon. Each timepiece is accented with a hand-stitched alligator strap. In all, the HM Perpetual Moon is a beguiling work of technical mastery and fine art.