I ran into this one (not attributed) on Heritage; you'll need a free login to see larger images. I don't see a lot of evidence of tripling so it might be a different one, but most of the features seem to line up with the images on NGC.
https://coins.ha.com/itm/barber-qua...bnail-071515
There's also this one, which shows a little more evidence of tripling in the bottoms of AR in quarter.
https://coins.ha.com/itm/barber-qua...bnail-071515
What I note about both is the strong separations for example at the top of U and the bottoms of ARTR in quarter. I don't see this on your coin, and I don't really see anything on "quarter". On yours the top left serifs of ED in United look much thinner, and this reduction in thickness is a sign of Machine Doubling. So I have to lean towards MD.
https://coins.ha.com/itm/barber-qua...bnail-071515
There's also this one, which shows a little more evidence of tripling in the bottoms of AR in quarter.
https://coins.ha.com/itm/barber-qua...bnail-071515
What I note about both is the strong separations for example at the top of U and the bottoms of ARTR in quarter. I don't see this on your coin, and I don't really see anything on "quarter". On yours the top left serifs of ED in United look much thinner, and this reduction in thickness is a sign of Machine Doubling. So I have to lean towards MD.

































