The timeless First Class by Perrelet covers its buxom body in rose gold and flashes its mechanical heart. Its transparency means you can admire the delicately openwork self-winding P.381 calibre which provides a 42-hour power reserve and spins the cogs with class. It also brings to life the hours, minutes and seconds. Blue leaf-shape hands burst from the heart of the metal lace to tell the time. The hour rim unfurls its long slim gilded indices around a guilloché ring like sun beams. Depending on which model you choose, this ring is available in silvery white for a classic look or deep black for a strong contrast with the gold. The 42.5mm case has two brown or black alligator straps with a rose gold clasp to wrap around your wrist. The model is also available with a delicately grained disc “cover” in black or white. Price: 10,450 CHF (rose gold) – 12,450 CHF (rose gold and skeleton)