David the Rosengrens V3 and others like the RHS, Saturnus etc were covered in some detail in the Ultimate freestanding safes thread- starts on pages 14 and 15 and goes from there.
All those old Scandinavian and Nordic ratings are long obsolete now- so V3, SS3000, INSTA 610 and resistance points etc are of little relevance today.
John (Safeman) added a wealth of knowledge in that thread on Rosengrens, Tann and Stratford and the link with A.B Vardeskydd who manufactured certain Nordic models for Intersec, some which carried UL ratings relevant to your USA market.