Joe O once wrote " You can clearly see the waffle pattern in the picture above, there are some exceptions of Kenner not using the waffle pattern, some early Star Wars cards can be found without it I believe, also important to note, the waffle pattern is not present on many foreign to Kenner MOC figures (Trilogos in particular)"
from:
http://www.imperialgunneryforum.com/t1110-vintage-moc-collecting-the-discussion-and-information-thread
no pictures: http://forum.rebelscum.com/t975724/
http://forum.rebelscum.com/t884905/