Found this item in a recently purchased collection and am having trouble identifying the grill.



It appears to be 11 x 13.50 mm. So would it be a Z (11x14) or is it an E (11x13)?
I know the odds are long that it's an 85C but this came from the same old time collection that I got a genuine 2L3 recently certified by the PF so I guess anything's possible.