Iron Man Mark 37 (Mark XXXVII), also known by its codename as "Hammerhead", is a Deep Sea Suit, and was one of several new Iron Man Armors created by Tony Stark as part of the Iron Legion. The armor was created sometime after the Battle of New York. The suit earned its name the "Hammerhead", for being to able to travel undersea and fully submerge itself without its system short circuiting and eventually malfunctioning. It was built for traveling deep underwater and has a thick reinforced armor specially built for the crushing pressure of subaqueous journeys. (Source: Iron Man Wiki). knock·off -ˈnäkäf/. noun: knockoff; plural noun: knockoffs. a copy or imitation, especially of an expensive or designer product. |--| "knockoff merchandise". These are NOT Official LEGO Minifigures and Sets. These are KnockOffs or Bootlegs for your Reference, Comments and Comparison. PLEASE. ALWAYS BUY & SUPPORT OFFICIAL LEGO SETS AND MINIFIGURES!!. CHECK OUT MY PLAYLIST:. LEGO IRON MAN SUIT OF ARMOR Sets and Minifigures.