Don't recall exactly when these were available. I bought 100 rds, 5 boxes for $10/box. I'm thinking it was between 1980-1985 or so. Bullets were 140 gr SP. Excellent Norma ammo.
Century Arms in St.Alban, Vermont was the hot ticket importer of milsurp guns for decades. Their import stamp at first was CIA then they regained their sanity and its been CAI ever since.