There has only been 1 Savage 99 cataloged with an octagon barrel since Savage stopped making sporting firearms in 1917, so that they could convert to military production in support of the US entering WW1. Since then, only the 75th Anniversary Commemorative, cataloged in 1970, has been cataloged with an octagon barrel. There were also some 99Cs made up with the leftover octagon barrels, but they weren't cataloged.
Jeff
