65 Dart Turn Signal Levers - 2 Styles?

Here are photos showing two different styles of turn signal levers in 65 Darts. The top one is a chrome shaft with a plastic end. The lower picture shows the more common all chrome style. Does anyone know why there are two styles? From looking at photos online it doesn't appear that one is for the GT model, or anything like that.
My car came with a chrome/plastic one and the end was broken off. So I replaced it with an all chrome one, which I was told was the correct lever for 65. Any info is appreciated.

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It looks like the Dart, Valiant, Belvedere, and Coronet all had the same turn signal lever. No matter the level of trim.
As listed in the parts catalog: Lever and knob, Illustration #8-50-129, Part #2580-226