Yes, this is an Argentine manufactured bayonet. Made by Suarez and marked with the Argentine crest over E.A. (Ejército Argentina) for Argentine Army. You don't see these around any where near as much as the cut down rolling block bayonets.
The Suarez carbine bayonet goes for big bucks compared to the cut-down Rolling Block bayonet. I've never seen one at a gun show but on ebay they go for $400+ fairly regularly if sold from the US. I bought an Argentine bolo type machete (not the bayonet) several years ago made by Suarez that was very reasonable.