I believe they are original to the car. the entire front end seems original. Does having the photos of the car and springs enough documentation to restore this way even if odd set?
Yes documentation especially where non other exists is important and can be enough (always depends on the judge
I think I should restore what I find? Thouhgts
Yes since there may have been a change in the markings between the time your car was built and when the car in my example was built IMHO
I would also find a place on the springs were the paint is the thickest, cut or sand through the top layer and wet it again (WD40 works well) to see if the color your seeing the light blue or could be the lavender I found on the build sheet for sure
Taking pictures again of course