Royal Jewelers offers this New Old Stock Jaquet Droz Les Lunes in mint condition. The 18K rose gold case is 41 mm in diameter. Gray outer dial with gold cabochon markers and silver guilloche inner dial with blued steel hands indicating hours, minutes, pointer date, day and month windows, and retrograding moon phase. The self-winding movement is visible through the sapphire case back. Black alligator strap with 18K rose gold pin buckle. Box and papers.