The brown coloring is applied to a shiny black plastic case. The insides/electronics are
all on one printed circuit board that is made to simply plop into the case and be secured
by a screw at each corner. I posted some pictures at:
https://www.mobileread.com/forums/sho...&postcount=640
and
https://www.mobileread.com/forums/sho...&postcount=650
They could have many of the cheap plastic bodies made and apply color as they estimated the demand to be then do the final assembly in numbers that match whatever
was ordered.
Luck;
Ken