The dye they used on those bags was somewhat defective , especially on models 509-517.
Even when kept away from the light they still fade. It happens almost exclusively with the gray corduroy material .
I’m sure your bags are in great shape but like all of our bags no matter how much you take care of them they will fade .
I learned a trick from Charles , if you have a bag that’s in good condition put it on a hanger in a closet it will fade less.
