Kappa

In 1956, the letter K appears on the socks produced by Maglificio Calzificio torinese, the Vitale family’s historic company. K stands for "Kontrollen," the German word for special attention to quality control. This decision, which later proved to be brilliant, stemmed from the return to the factory of a batch of defective socks. What initially was just a way to signal quality soon became the Kappa brand symbol.