I have one of these bayonets. I bought it at a gun show in Detroit circa 1984. It has SA on the metal grip and a plastic scabbard with frog. It fits the Steyr import "match" rifle that I have with the "US" hider flash. I also have some of the UKbayonets that look like this bayonet but they don't fit the US rifle. They were built to fit over the barrel of an FAL with no hider flash thus the prongs.
The bayonet that I have, T48 style, is the only one I have ever seen, anywhere. It is interesting to note that the only rifles I have ever seen with the T48 hider flash on them besides the T48 and the US imports is the Cuban contract rifle.
Anyone know of any FALs that had this hider flash besides these models??????