The design of Key Pin & Cuff Links is inspired by one of the first products produced by Skultuna in the early 17th century. The iconic key is a symbol of Skultuna. Gold-plated brass or steel. Designed by jewelry designer Kajsa Avila for Skultuna. The brand Skultuna was founded in 1607 by King Charles IX of Sweden as a brass foundry. Today, Skultuna is one of the oldest companies in the world and still purveyor to the Swedish royal family. For over 400 years. Skultuna has been producing products of the highest quality for everyday use and for special occasions. Material: 316L steel gold plated