It will get a 1 (or possibly an A because of the ripped portion, they aren’t consistent with that.)
No reason Zeenuts should not be given a numerical grade. If a Bazooka, Post Cereal, Jello, or Hostess card can get a numerical grade having had all 4 edges trimmed (as intended) then Zeenut cards should be graded as well. They should specify, however, that it is without the coupon.
I like the artwork on the back! A rare glimpse into the life of a young child in 1913!