The rifle that you have was built on what is generally referred to as an "HVA" action. Leupold, Redfield, and Weaver have all made bases for this action. IIRC, there is a detailed matrix of the bases that fit Husqvarnas over in the Swedish sporting/commercial rifles section at GUNBOARDS.
You might also consider contacting the resident expert on all things Husqvarna, "SBHVA", since he probably knows the part # for every make and style of base that fits Husqvarna rifls like the warts on the back of his hand.
Jeff
