Piaget's Protocole distills the maison's dress-watch language into a compact, sharply geometric form, and this reference 91542 leans fully into that identity in 18K yellow gold. Its 25mm by 27.5mm case and champagne dial create a monochrome presentation that feels restrained and distinctly Piaget. A manual-wind movement keeps the profile to a notably slim 4.8mm. On the wrist, it wears as an elegant, discreet dress piece with crisp proportions.