Air filter

[Mr70]

I've an advertising photo taken in late fall 1969 of a Z/28 with an upright A212CW square mesh filter on it,but can't get it to post,and when I shrink it,the quality suffers.
I suppose it's a moot point anyway,as has been said,earlier cars seem to have had the diagonal square mesh,(turned on their bias),and later got the upright square mesh.
('69 camaros were made much later on into 1970 production year)