redone by GPA.
Careful, nowhere in the ad does it state that. Says GPA parts were used, which means uncle Mel probably reconed them. I've not seen white grease pencil writing on any GPA work, definitely visible on one cone

FWIW, my GPA 604H III type cones are much more black, don't have the blue tint like those. However, i think GPA still use 3 or 4 different 604 cone types, and maybe one has that strong blue tint. Of course it could just be a camera anomaly casting the blue hue too.