The top plastic has yellowed on all of these. Plastic has become brittle and may have minor defects. But the are new. NEW OLD STOCK item. What a find!! I have seen very few of these ever come to market. this is part of the dheins hardware hoard that has been locked away inside a true value store that has been closed for 25+ years. he was a regional distributor in the 1980's for ti. Check out the many very cool vintage computing items I am selling. Questions. please ask. thx, zach