Do you know where to look for doubled dies on the States and
ATB Quarters? On the central area of the design. All the out devices are often affected by
Machine Doubling or die wear. So The 1999 quarters further look for these areas to be doubled:
Earlobes:

Motto on the devices closest to center:

Reverses as I mentioned on the central areas. To see what to look for on these Check doubleddie.com as some years there are many listed.
State doubled dies:
http://doubleddie.com/179401.html
Islands:
http://doubleddie.com/228464.html
ATB Quarters:http://doubleddie.com/719755.htmlWhen you look up and read this information, then you will learn what to look for and where doubled dies can be found. The outer areas searches is pretty much a waste of time.
Know what to look for and you will be less frustrated.