Here is another puzzler from the Guide. Stardust Slot Club cards with the familiar lavender front are listed as types 4, 5 and 6 with these differences...

Type 4 (Shaded PPC Logo & "Patent No. 4,941,686" on reverse.)
Type 5 (Unshaded PPC Logo & "Patent No. 4,941,686" on reverse.)
Type 6 (Small PPC Logo & "Patent No. 4,941,686" on reverse.)

Now, I have a bunch of lavender cards with small and large boxed PPC's on the back. If the Small logo cards are type 6, is the larger PPC in white in a black box the "shaded" version? I think so, but want to check.

They also list a type 6 Grey ("Stardust Slot Club") - (Emergency/temporary card. Blank reverse.) Is that what I have here? When I found this one last December, I couldn't figure out what it was. I would be certain I have what they are talking about, but they call it grey, and mine is totally silver.