Portofino Ultra-Thin Yellow Gold

In Context

At 32 mm it is small by current standards, in the range most wristwatches occupied before cases began growing through the 1990s. The 4.8 mm case is genuinely slim and goes under a shirt cuff without argument. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse.

The movement winds itself from the motion of your wrist.

IW2010-01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a white dial with a yellow gold case.