The Ulysse Nardin San Marco reference 139-70 Pisa is an extraordinary piece of horological art, distinguished by its exquisite hand-painted enamel dial and extreme rarity. Housed in a 37mm case (likely platinum, given the "Pisa" limited edition context and the exclusivity of the model), this timepiece features a breathtaking enamel scene, a hallmark of the San Marco collection that showcases the brand's mastery of the ancient art of enamel painting. The dial, often depicting intricate maritime or mythological scenes, is a miniature masterpiece that demands close inspection and appreciation, setting it apart from mass-produced luxury watches. The limited production run of only 10 pieces makes it a true "grail" for the serious collector, offering an level of exclusivity that few other timepieces can match.

Powered by the legendary Ulysse Nardin Caliber 67 (often based on the ETA 2892-A2 but heavily modified and finished to the brand's high standards), this movement provides reliable timekeeping and a 42-hour power reserve. The 37mm size offers a classic, elegant proportion that sits comfortably on the wrist, suitable for both formal occasions and as a statement piece for the connoisseur. For the enthusiast seeking a piece that combines historical significance, artistic brilliance, and extreme scarcity, the San Marco Pisa is a pinnacle achievement. It represents not just a timekeeper, but a wearable work of art and a significant investment in the legacy of Ulysse Nardin's enamel tradition.