Just got a couple of certs back from Bill Weiss last week, and I'm sure he knows how disappointed I was when the 4th one didn't come back the way I wanted it to..... :(
But thought I'd show the front and back of a couple of certed grills, in case anyone wanted to see the backs.
This one was certed as a unused, no gum "D" Grill, #85. I bought it at least a year ago as a used #88 on
ebay, but could easily see 15 columns from the
ebay image. Remember that the only real difference between a #88 "E" Grill and a #85 "D" Grill is that the "D" Grill has exactly 15 columns and the "E" Grill has exactly 14 columns. The "Z" Grill also has 14 columns, but the ridges are horizontal instead of vertical as in this one:

And on the back, Bill did note a small filled thin:

Here is a used "A" Grill #79, which is "Points up" on the face of the stamp, and grilled all over...there are only 3 sides of perfs, but on a lot of the "A" Grills, the perfs can be damaged even worse than this one:

And the back:

Hope you enjoy...Ray