The Cartier Ballon Bleu Moonphase is an iconic luxury timepiece featuring a distinctive cushion-shaped rose gold case with the signature blue sapphire cabochon crown. This model showcases a silvered guilloché dial with Roman numerals, blued-steel sword-shaped hands, and a sophisticated moonphase complication at 6 o'clock—displaying lunar phases with a stylized moon against a starry sky. Powered by the in-house Calibre 8217 automatic movement (as indicated by the text '37搭配8217日本机真星辰功能'—though note: 8217 is actually a Swiss-made Cartier movement, not Japanese; the Chinese text appears to contain misinformation), it offers precision timekeeping with date and moonphase functions. The watch pairs elegantly with a brown alligator leather strap, enhancing its refined, timeless appeal. Ideal for formal events, business settings, or sophisticated daily wear, it balances classic elegance with horological complexity. Water-resistant to 30m, it’s crafted for discerning collectors who value heritage, craftsmanship, and subtle sophistication. The polished rose gold case (37mm diameter) ensures comfortable wear while exuding understated luxury.