It's nice even if the grain looks a little "tame" for Brazilian.
Still, the usual answers are that someone's seen EIR that's as highly figured as Braz is supposed to be, and vice versa (relatively straight-grained Braz), but "If I recall correctly", date-wise, there's a very good chance it IS Braz. I think '67's when Brazil officially stopped exporting and Martin stopped offering it, but I think Guild was still using stockpiled inventory for a couple of years, as late as '69 and even '70 on D-55's, at least? Somebody please correct me if I'm wrong!
The grain does have "something about it", though, maybe it's the closeness of the patterns and the high contrast of the darker streaks. I seem to recall seeing one like that being shown here before by a trusted member. That one was supposed to be for sure Brazilian, even though the grain was relatively "even" like your example.
I'd vote Braz based on date but if it was an '80's example I'd have no problem saying "gotta be EIR".
There's also the report that Brazilian smells like bubblegum, if you've never head of that one. Not sure how long that lasts, though.
Most of the time we hear it just smells like cigarette smoke.....