The watchmaker Girard Perregaux have released a line of pens with designs inspired by their watches. The watches cap is decorated with the Girard Perregaux Tourbillon cage and the clip inspired is by the Tourbillon bridge. The finish is made of celluloid which is a cellulose base organic material which is shock-resistant, light, pleasant to the touch, and extremely durable. The pens are limited edition and available in Havana (pictured) or black celluloid and yellow, pink or white gold.