L. Leroy 18K Rose Gold "Osmior" Retrograde Perpetual Calendar Moonphase Automatic Gent's Watch. Grand complication from a rare ultra-small production atelier. Current Model. Reference LL103/3. Champagne Leroy toned hand-guilloché gold dial True perpetual calendar with leap year indicator. Moonphase with northern and southern hemisphere moon, sky-disk by aventurine precious stone (deep blue with sparkles of gold dust). Retrograde flyback date indicator. 41mm without crown (42.5mm with crown), 11.5mm thick. Weighs approx 104 grams. Has a lot of gold content and very solid for a watch on strap. L. Leroy has an annual production of about 100 pieces. Very small and exclusive brand, and each piece is crafted to perfection using the best materials and techniques. Finishing is superb and comparable to the very best of the independent watch houses such as Laurent Ferrier, Phillippe Dufour, Guy Ellia, Christophe Claret, FP Journe.Leroy