IWC Portofino Automatic 37 Watch, 37mm Grey Dial, IW458102A purist design and a touch of luxury: with a case measuring 37 millimetres in diameter, this simple, elegant three hand timepiece fits perfectly round a slender wrist. The opulent design and slightly smaller case of the Portofino Automatic 37 are a source of delight for devotees of timeless wristwatches. A black alligator leather strap from Santoni was selected for the stainless steel model with 12 diamonds on the slate coloured dial. The precious