The IWC Portofino 3513 is a classical gentleman’s watch with self-winding movement that was available from the late 1980’s to the early 2000’s. Its case, in yellow gold or stainless steel, measured 34mm across, housing either a caliber 37521 or 30120 movement depending on the year of production.In yellow gold, the watch also came with an integrated bracelet as reference 9251 and 9261. In the case of the former the bracelet is soldered; with the latter it is bolted.Reference IW9251-04 has a Yellow Gold case and a Black dial.
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