What are the visual differences between 68 window crank handles and those of later years?

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Patrick, aka Merlin
1968 SS 396/325 4-Speed, White with black vinyl top & black interior.
ACES #5131
TC#1017

Pat,
I'm not sure what is correct for 68'I know of Black knob handles and clear knob handles,knob color is the only difference.

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71'Elcamino SS454