Quoted By:
This guy is from Mis Ladrillos, an Argentine brand. I've also seen a Chinese brand called Tatco using figures that were mostly identical, and guess this is where they came from. It also seems Tatco has replaced those figs with another design. Even to this day, Mis Ladrillos uses the same figs, including old visorless helmets, though none of the fig's pieces are removable. They can still hold Lego accessories in their hands.
Not sure if the bricks themselves are the same. In pics and videos of Tatco it seems that they look and act like Lego. From personal experience ML are slightly, like one or half mm taller than Lego. Length and width are the same, you can try putting ML on top of Lego, but there's not a hint of clutch. And if their studs were barely thinner or of a softer plastic, you could place Lego on top of them. Also all studs are hollow though you can't place rods on them.
This makes me wonder, are Mis Ladrillos bricks their own or "licensed" from another company? And if the former is true, did they take their figs from Tatco or the other way around?