Here's a picture of a couple of cases containing suspensions, spotted at a local gas & electric depot. The interesting thing to me is that the case on top has a single brown suspension disk (visible in the picture), and the other 5 or so on the same string are all that new sky-tone glaze.

According to a discussion on ICON, they might have come from the factory this way, or (perhaps more likely), the odd-colored one may have been added as a repair in the field, and the string may have then been repackaged. These cartons are rather flimsy, so they wouldn't survive too many load and unload cycles!