Three models of the exclusive Flagship Heritage by Kate Winslet watch are being auctioned online by Swiss watchmaker Longines with proceeds going to The Golden Hat Foundation—a charity co-founded by Winslet herself, which aims to raise awareness of autism. Winslet unveiled the limited edition timepiece recently at the Longines’ boutique in Paris, and the watch’s dial is the same as The Flagship Heritage watch – 60th Anniversary 1957-2017. Winslet, Longines’ Ambassador of Elegance, chose the dial, the case and the strap of the watch when she visited the brand’s headquarters in Switzerland last year. The collection is super exclusive with just five gold watches—of which one was gifted to Winslet, and one is in the Longines museum. The models numbered 2/5, 3/5 and 4/5 are up for auction on the Longines’ website. The auction will continue until June 30, 2017.