C&D) 4th run Ion:
How to tell:
Much like the 2nd run is to the 3rd run, the 3rd run is to the 4th. The only real difference between the two is that the flight plate has been changes to "candy", or transparent plastic. The still have the smooth flight plate, the reseated overmold, the embossed lettering.
3rd run vs. 4th run, Opaque vs. "Candy" plastic
SPECIAL BONUS MATERIAL!
2nd run GLOW Ion:
The proto types for the glow Ions were made from the exact same mold, tooling, ect as the 2nd runs, but had the Eclipse™ overmold. There were only 10 of these discs made, and only 4 sold to the public!