Ilderim was built in 1936 at Abrahamssen & Börjesson, Ramsö Varv in Sweden. She was commissioned by Swedish banker and industrialist Marcus Wallenberg expressly to compete in the sailing events of the Berlin Olympics, held on the waters of Kiel Bay.
Wallenberg sold Ilderim shortly after the Olympics, as he was already planning his next 8mR. True to his habit of naming all his yachts Ilderim, he required that the name be changed upon every sale. Consequently she spent most of her life sailing as "Christina" or "Christina of Cascais" — until 1989, when Belgian owner Marc Busschots bought her and restored her original name.
Over the decades she sailed the English Solent and the Riviera, and kept home ports in France, Portugal, Ireland and Scotland before arriving in Finland in 2010. She currently races under the burgee of HSS and is equipped by Ebba & Bea Stelander.