Front two turn signals look stock from factory.
The two on top maybe a option or a dealership add.
the mid fifties is where GM started adding turn signals that were standard. It was a option on a lot of vehicle and standard on others.
When you get into 60 its pretty much standard.
And to add to the fun. A lot of lighting and other items were dealer added.
So you see a lot of options. I have seen heavy duty. 56 models with just the two lights on top others with 3 some all in middle others spread out.
Seen them with the signals on the fender tops and others without.
They all look DOT ready.
