https://www.marvinsflyingdisccollection.com/wham-o-pluto-platter.html
Wham-o Pluto Platter - Marvin's Flying Disc Collection
I started this a little backwards to read about the pluto platters I did the newest to oldest starting from here, It could be helpful to start from the bottom...
pluto platterflying discwhammarvincollection