Dynaudio C1 Nameplate

I am looking at used Dynaudio C1s and most of them have a silver nameplate on the back with the Dynaudio logo, "Confidence C1," the impedance and "Made in Denmark."

I have seen a few for sale that have a simple black nameplate that simply says, "Confidence C1" in white letters.

Anyone know what the difference is in the speakers with the different nameplates?
I would take a guess they are early editions. I have seen this in other Dynaudios.
Mattmiller, thanks, that's kind of what I thought. That or maybe they were pre-production samples or demos.