Introduced in 1979, the HR 352 underwent various upgrades through the years. Around 1986 the skylight in the saloon was increased in size to give more light into the saloon. The locker doors of the saloon became louvered as on the larger Hallberg-Rassy sisters. Again the hull was raised, but only some cm, in order to get even better volume under deck. When the HR 352 was presented in 1978 it was described as "A boat with future" which indeed is valid still today. This counts especially for "Symbiose", she is kept in good condition with valuable goodies.