Plain Jane NLR's do exist.
And yes, I agree, pattern says NLR on that one.
There are six-ribbon Rainbos.
However, I am inclined to think NLR-era for yours.
Whether my champ guess is good or not, here's why I think swirl: as well as I can tell without having it in hand, it looks like that yellow ribbon (with its white ribbon sidekick) takes the form of one continuous stream.
My $.02
I think I may have one of those!
Fractured. But still ....
It was one of my mysteries from last night, and there were sufficient numbers of other Alleys to make it seem possible.