I did a survey on 100 random examples of the
ATB Quarters. 70% of the time they show slight to strong
Machine Doubling. It is enlarged because the devices are incuse. slight
Machine Doubling creates an enlargement of the devices. (Just the opposite for raised devices. Machine doubles then raised one by reducing them) The real area to look for doubled dies is on the central areas of the design on both side of the States and ATM quarters. (Obverse Earlobes and central Motto devices, Reverses in the center area of the design. Check doubleddie.com for what to look for on these designs.