I have NOS 70-71 turn signal switch, The part number is 914.613.927.12 It is still wrapped in the package.

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I thought they were all the same. What's the difference between this and the later years?

The early one he has does not have the plug on connector at the bottom. It has a 12 pin plug like is on the relay board. Major pain to change out.
Bruce

Bruce is correct also looks different in front.

Picture #1 shows the early style from the front & #2 is the late style.