LEGO Logos

My summary of the 6 logos seen on 3001old 2x4 bricks.

 

Wide logos touch the sides of the studs - narrow logos do not.

 

Straight O means the sides of the O are parallel. Round O means the sides of the O are convex.

 

I believe the Round O variants to be exclusive to Samsonite.

 

If you can contradict any of the information here, please let me know!

Done