Got this in the mail today-- paid $3.60 + $1.25 shipping for 3 covers and you usually can't pay too much attention to something that's been written by a collector or dealer on a cover front, but this one caught my eye, and for $5, who cared?
It says on the bottom left of the cover "85", and the color of the stamp told me that it would be no worse than an "E" grill #88, but when I put a light on the front of the stamp at an angle, it has 15 COLUMNS, which is a "D" grill, and #85.
I've got a couple of other bad copies of #85 with certs, and unless the grill is a fake-- and it could be-- the stamp is not tied to this cover, and was probably placed there much later, this well could be a #85, $1000 Scott CV, "D" Grill.

I'll be heading to Louisville in the morning with Al E. Gator-- looking forward to a nice drive with some nice company and hope to bottom feed for covers all day tomorrow!
Ray