A rare collectible set of four porcelain mugs by Porsgrund, from the “Norske Klassiske Skip” series designed by Cato Strøm for Firkløveren around 1980. Each mug features a detailed illustration of the traditional Norwegian sailing vessel Fembøringen, with deep cobalt edging and a classic shape. Excellent condition throughout, each mug comes with its original authenticity certificate. Approx. 9.5 cm diameter, 15.5 cm height. Made in Norway