IWC’s diamond-set Portofino adds a quietly moving day-and-night scene

Reference IW659803 takes the Portofino Automatic Day & Night 34 in a jewellery-led direction. Its steel case carries a diamond-set bezel, with further stones on the silver-plated dial. Gold-plated hands and appliqués provide a warmer contrast. IWC specifies 66 diamonds across the case and dial, weighing a combined 0.99 carat.

At six, a rotating disc shows the sun or moon in its upper half, completing one turn every twenty-four hours. Automatic calibre 35180 stores 50 hours of power. The steel case measures 34 mm across and 8.9 mm thick, with anti-reflective sapphire and 5-bar water resistance. A taupe calfskin strap uses a quick-change attachment and butterfly folding clasp.