When the collaboration started between Katja of Sweden and Tretorn, a tall, slim boot was first named Katinka. The boot was available in the colors black, red and antique brown. It was the first time you made a rubber boot in such a thin and flexible rubber and also the first time you used stretch lining. In the autumn of 1970 several new models came from Katja of Sweden. The boot Karenina with a slightly higher heel, Candida which had a collar and several other boots with such as structure and crocodile pressed rubber.
At the beginning of the 1970s, new boots were launched each year, still in the same style with high and narrow shaft and both high and low heels. The focus of the production was on the boots being fashionable and elegant. They chose to name the new collections according to different cities, including Zurich and Budapest. Budapest was an elegant boot that was up to 44 cm high and with 5 cm heel. It was also manufactured with a plateau sole, in the 80s. It is this Budapest boot that stands as a model for today’s Acquo models, with the slightly higher heel.
Sales of Tretorn’s fashion rubber boots flourished and the soft, elegant boots were sold in several exclusive stores around the world. The model Katinka was a bestseller in the UK especially where the luxury store Russel & Bromley, among others. The collaboration continued for many years during the 70s and 80s and Tretorn also produced a couple of special models exclusively for the store.