He is saying it is a Z grill - Scott 85C. It looks possible to me - I'm trying to see if the ridges are horizontal. They might be, but as Sinclair points out we need better lighting on the grill to see it more clearly.
I think the image is a bit stretched horizontally which contributes to the suggestion that the points could be horizontal. The problem is it appears to possibly have a partial row at top and only around 16 horizontal rows. It is 99.9999999% likely to be an E grill but you should still learn how to view a grill. Spend your time and money on learning and not on certs! A low quality #88 will return about 1/8th of the cost of getting the cert.
I can probably do it with a desk lamp and my ipad. When I get a chance, I'll play with it. I can't tell even looking at it if the points are up or down! The grill measures the correct size, but the direction, now up or down is a big difference! lol
This is a Scott 88, E-grill. The shade & impression are not consistent w/ a genuine 3c Z-grill, nor is the grill impression, (and especially) nor is the horizontal "half ridge" of points at top (in fact, the horizontal half-ridge is the easiest & quickest way to spot E-grills if you're just quickly flipping through grilled stamps).