Picked these tapes up when i bought a box of G1s in the early 1990s at a 2nd hand store. Recently saw an ebay auction that had the same Frenzy cassette box as the one i have, that was listed as a K.O. Went thru all my G1 tapes and noticed Frenzy and Ravage didnt have a Takara or Hasbro copyright stamp. On Frenzy its suppose to be on his cassette side, and Ravage on his tail. Anyone know if Diaclone or Microman lines produced toys without a Takara stamp? Posted pics below. Are these genuine, or early 80s K.O.s? Thanks.