I'm not sure, but I also noticed that. The only thing I can think of is the case looks pretty true to the original color. I have 3 of them sitting around here, one with an ICD Adspeed in it and another with some sort of Kickstart modification (boots to WB 1.2 prompt).
I tried to get one of them going to test some hardware the other day and they all have floppy drive issues. Seeing this makes me want to get at least one of them all cleaned up and working!
Jeff