Cartier Santos Dumont ultra thin Guilloché dial with box and warrantee paper ref 8210A the Cartier Santos Dumont ! By now, everyone is familiar with the story of Louis Cartier crafting a wristwatch for his friend, aviation pioneer Santos Dumont. This legendary piece has become a timeless classic an icon in the world of horology. Over the years, we've come to appreciate the ultra thin (or, as the French say, extra plate) versions because theyre not just ultra thin, theyre also extra cool! (Ba dum tss!) Let us explain: These hand wound