Two types of Peaked Trico Wiper Blades

[Pacecar]

Seeing 2 different styles of " Peaked" Trico wiper arms. First has 2 bends and comes to the typical peak or point that comes to mind. The other has 3 bends and comes to a flatter peak. This style is not the flat style replacement Trico wiper blade. These are on 1968 and 1969. Why the difference? Is it a production date issue ? thanks