Here, nanoparticles are woven into the calfskin bracelet, adorned with silk embroidery and mother-of-pearl shards, to diffuse the scent of passing time. So what does time smell like? “To transform the concept of time into a scent, I referred to the sun, our ultimate source of light and warmth, which gives rhythm to our lives, and amethyst, with its deep, time-evoking colour. These elements have allowed me to translate these vast ideas into scents and the abstract notion of time into discernible fragrance notes,” [perfumer Dominique] Ropion says.

— Égérie The Pleats of Time from Vacheron Constantin is billed as the world's first perfume watch (nobody told them about the Kaoru Aroma, or the banana-scented Swatch, among others). Read more in I Test Drove The World’s First Perfume Watch. This Is What It Smells Like at Vogue UK, or see Fragranced watches are the future, predicts Vacheron Constantin at Wallpaper.