"... a little history of this head aka lock nut. My friend Ronald Morikawa was a avid fisherman that used to go to Kona to fish. He fished with Kenny Llanas in the late 70s-80s. He shared this lure with Kenny. Kenny named it the locknut because fish used to eat it and didn't let go. Later Kenny and Bomboy started making  versions of the original. Others filled soon after like Joe Yee (lock washer). And a few other Hawaiian lure makers such as my friend Ronald Shiroma.

Straight cut sides Aka plungers was the normal. The locknut has a reverse taper. Scale holographic paper was the paper in the 70s early 80s along with some herringbone patterns. After that early 80s came the paper clip holographic like you see in the picture of the lure. Then 80s-90s saw the starburst holographic paper."