Came across a listing for Decepticon Headmaster Mindwipe, which looked like a sealed toy until you read the listing.

I did a quick search, and found this picture online of a genuine Mindwipe. Notice in bottom right corner assortment is 5897 while on the KO the assortment is in a different font, and number 5898.

I don't know if assortments on G1 originals vary, so it might not be the best way to identify the Ko. I remember there was KO Weirdwolf previously, so maybe there are more Headmasters in the wind.