4160 Tuesdays—the number of Tuesdays we'll have in our lifetime if we live to be 80 years old. 4160 Tuesdays is an artisan perfume house based in London, founded by perfumer Sarah McCartney. An author and former writer for UK-based perfume and beauty product company Lush, Sarah is a self-taught perfumer who studied fragrance composition in order to bring to life the fictional fragrances crafted by a character in her novel The Scent of Possibility. 4160 Tuesdays fragrances are composed by hand in small batches of 200 or less, using perfume techniques from the 1880s through the 1970s.